15 W 3-coil fixed frequency Qi-certified wireless charger ... · The controller supports automatic...

IntroductionThe STEVAL-ISB047V1 wireless charger evaluation kit includes the STEVAL-ISB047V1T transmitter reference design boardand an STEVAL-WBCDNGV1 USB-to-UART dongle for PC communication.

The transmitter is based on an MP-A15 3-coil topology, with a sepic DC-DC stage supplying a half bridge inverter operating at127.7 kHz fixed frequency, for compatibility with proprietary fast charge modes of popular smartphones.

The transmitter is designed to accept a 15 W, 5 to 20 V input as per the USB type-C™ power delivery specification, or limit theinput to 5 W if supplied by legacy 5 V USB chargers.

The STEVAL-ISB047V1T is certified under WPC 1.2.4 EPP specification, thus interoperable with all Qi-certified receivers,including mobile phones, cases and power banks, and supports resistive and capacitive modulation.

The transmitter is capable of 15 W potential power Qi EPP bi-directional communication and is backward compatible with 5 WBPP receivers.

The STWBC-MC controller monitors and drives the STEVAL-ISB047V1T transmitter, including the digital DC/DC controller thatregulates the transmitted power. The controller supports automatic coil selection based on the best coupling with the receiver,as well as a patented Q-factor measurement for accurate foreign object detection (FOD).

You can communicate with the controller via UART, and monitor the behavior of the transmitter on your PC using the STSW-STWBCGUI graphical interface.

Figure 1. Wireless charger kit top side with coils

15 W 3-coil fixed frequency Qi-certified wireless charger TX evaluation kit based on STWBC-MC

UM2491

User manual

UM2491 - Rev 3 - February 2019For further information contact your local STMicroelectronics sales office.

www.st.com

https://www.st.com/en/product/steval-isb047v1

https://www.st.com/en/product/stwbc-mc

https://www.st.com/en/product/stsw-stwbcgui


Figure 2. Wireless charger kit bottom side with transmitter board

UM2491

UM2491 - Rev 3 page 2/81

1 Getting started

You need the following items to use the evaluation kit:• Evaluation kit components:

– Wireless charger system with STEVAL-ISB047V1T transmitter board and 3 coils– STEVAL-WBCDNGV1 USB to UART interface dongle with micro USB cable for debugging and GUI

interaction– 12 V, 24 W AC/DC adapter– USB Type A to Micro USB Type B cable

• Additional hardware:– PC running Windows XP or higher and the .NET framework 4.0– ST-LINK/V2 in-circuit debugger/programmer with single wire interface module (SWIM)– 30 W USB-C PD wall charger

• Software:– ST-LINK USB driver– STVP programming tool from STMicroelectronics (integrated in the sttoolset available on st.com)– FTDI VCP driver http://www.ftdichip.com/Drivers/VCP.htm– STSW-STWBCGUI PC GUI installation package

UM2491Getting started

UM2491 - Rev 3 page 3/81

http://www.ftdichip.com/Drivers/VCP.htm


2 STEVAL-ISB047V1 wireless charger kit overview

Figure 3. STEVAL-ISB047V1 block diagram

GPIO Expander

Amplifier

Coi

l sel

ect 1

LDO 4.5V

Coi

l sel

ect 2

2V to 28V

Symbol Detection

QFOD

Phase

Detection

DC to DCSMPS

Gat

e D

river

I2C

5 to 20V

Demod

SEPIC

Boot

stra

p

Coi

l sel

ect 0

supervisorVoltage

Symbol

Current LC adapter and switch

LC adapterand switch

LC adapterand switch

2.1 STEVAL-ISB047V1T wireless transmitter boardThe STEVAL-ISB047V1T transmitter board features:• WPC Qi 1.2.4 certification• Standard Qi MP-A15 3-coil transmitter• Qi EPP bi-directional communication• Triple path signal demodulation• Best coupling-based coil selection and presence detection• Coil current and temperature monitoring• Input voltage monitoring• Foreign object detection (FOD)• Quality factor measurement• LEDs for charge status indication• UART connection for user interface and firmware download• SWIM connection for firmware download• 5-20 V power supply• STUSB4500 Auto-run Type-C™ and USB PD sink controller• USB quick charge

UM2491STEVAL-ISB047V1 wireless charger kit overview

UM2491 - Rev 3 page 4/81

https://www.st.com/en/product/stusb4500

Table 1. Electrical characteristics

Parameter Description Notes and Conditions Min Typ Max Unit

Vin Input Voltage 5 12 20 V

Iin

Input current Vin 15V, load 15W on MP1B Rx 1.27 2 A

Input No-load current - mA

Input Standby current At typical voltage 1.4 mA

Fs Fixing frequency 120 128 136 kHz

Duty cycle Duty cycle modulation duty cycle 5 50 %

ƞ Full load efficiency Vin= 15V, P Out Rx = 13 W 75 %

Figure 4. STEVAL-ISB047V1T transmitter board interfaces1. J101 Power supply jack connector2. J800 Power supply USB connector3. J400 UART connector4. Green LED and Red LED5. J401 SWIM connector6. Power Coil connections7. Test points8. Jumper for supply selection:• DC jack supply: jumper on left position• USB PD supply: jumper on right position

1 2 3 4

5

6

78

Table 2. Test points

Test point reference Signal Description

TP100 VINPUT power supply input connection

TP101 GND GND power connection

UM2491STEVAL-ISB047V1T wireless transmitter board

UM2491 - Rev 3 page 5/81

Test point reference Signal Description

TP102 VIN Input voltage

TP103 VDD_STWBC 4.5V LDO output voltage

TP200 VDCDC SEPIC output voltage

TP300 GND Power GND connection (Rsense)

TP301 VRSENSE Rsense resistor voltage

TP400 GND GND connection



TP403 I2C_SDA STWBC I2C signal

TP404 I2C_SCL STWBC I2C signal

TP405 I2C_Q0 I2C first pulse

TP406 GPIO 1 GPIO 1

TP600 SYMBOL_DETECT Symbol detector

TP601 CURRENT_DEMOD Symbol detector

TP800 CC1 USB-C configuration Channel 1

TP801 CC2 USB-C configuration Channel 2

TP900 Coil 1 Coil 1 connection

TP901 Coil 1 bridge Coil 1 connection





2.2 STWBC-MC pinout and pin description for 3-coil MP-A15 configurationThe STWBC-MC is a multifunction device that can support several wireless charging architectures. This sectionshows the pinout used by the digital controller when the 3-coil MP-A15 configuration is used.

UM2491STWBC-MC pinout and pin description for 3-coil MP-A15 configuration

UM2491 - Rev 3 page 6/81


Figure 5. STWBC-MC in 3-coil MP-A15 configuration

Table 3. Pinout description

Pin Number Pin Name Pin Type Firmware description

1 UART_RX DI UART RX link on USB debug connector

2 PWM_QFOD DO PWM dedicated to QFOD circuit

3 I2C_SDA DO I2C_SDA

4 I2C_SCL DO I2C_SCL

5 DNBL DO Output signal for HB low side driver

6 LED DO Digital output for green and red LEDs indicators

7 QC_IO DO Quick Charge circuit signal

8 CMP_OUT_V AI SEPIC output voltage sensing

9 CS_CMP AI SEPIC current sensing

10 DCDC_DAC_REF AI DAC reference value for SEPIC output voltage

11 WAVE_SNS AI Symbol detector based on delta frequency

12 CURRENT_DEMOD AI Current demodulation

13 VDDA PS Analog power supply

14 VSSA PS Analog ground

15 TANK_VOLTAGE AI Analog input to measure the LC voltage (power calculation)

16 VTARGET AI SEPIC voltage measurement


UM2491 - Rev 3 page 7/81

Pin Number Pin Name Pin Type Firmware description

17 QFOD_ADC AI High sensitivity peak voltage detector used for Quality Factor measurement

18 COIL_TEMP AI Analog input for temperature measurement. The input is connected to externalNTC biased to VDD_STWBC

19 ISENSE AI Analog input to measure the current flowing into the power bridge

20 VMAIN AI Analog input to measure the main power supply

21 DCDC_DRV DO DCDC SEPIC PWM drive

22 DEMAGNET DI Transformer demagnetization sensing

23 SYMBOL_DETECT DI Voltage demodulation

24 DCDC_DAC DO SEPIC PWM output DAC (setting the CPP3 comparator voltage reference)

25 UPBL DO Output signal for HB high side driver

26 DNBL_FB DI Hardware PWM feedback

27 SWIM DIO Digital IO for debug interface

28 NRST DI Reset input monitoring

29 VDD PS Digital and I/O Power supply

30 VSS PS Digital and I/O Ground

31 VOUT Supply Internal LDO output

32 UART_TX DO UART TX link on USB debug connector

Note: The operative voltage of analog inputs (AI) ranges from 0 V to 1.2 V.


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3 Firmware download and update procedure

To download the firmware to the board, install the GUI software which allows complete board monitoring viaUART signals. To use the STSW-STWBCGUI, UART signals must therefore be accessible.

If you experience problems, you can use ST-LINK and STVP software to erase the STWBC-MC Flash memory.

3.1 STSW-STWBCGUI software installationStep 1. Install the GUI by launching the STWBC_GUI_Setup.msi installation file.

Figure 6. STSW-STWBCGUI installation file

Step 2. Connect the UART cable from the transmitter board to the USB-to-UART dongle on your PC or laptop.Step 3. Check Windows Device Manager to identify the correct port number and select the appropriate USB

serial COM port.

UM2491Firmware download and update procedure

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Figure 7. Windows Device Manager: COM port selection

Step 4. Enter a specific COM port number (if not listed in the selection window) in the [Special] text box (e.g.,“COM12” or the specific syntax \\.\COM12).If the GUI is turned off, ensure that the COM port is not being used on your computer. Otherwise, tryanother USB port.

UM2491STSW-STWBCGUI software installation

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Figure 8. STSW-STWBCGUI start screen

Step 5. Press OK.The GUI is ready to run.

UM2491STSW-STWBCGUI software installation

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3.2 Firmware download with the STSW-STWBCGUI software

3.2.1 Firmware update procedure (chip already programmed)The STEVAL-ISB047V1 is delivered with pre-installed firmware. Follow the steps below to update it:

Step 1. Click on the following link and download the FW binary CAB file onto your PC: STSW-ISB047FWStep 2. Save the file as WBC_FW_ST_MP2_V*.**.cabStep 3. Supply the transmitter board with the 12V power supply contained in the kit.Step 4. Connect the USB-to-UART dongle to the transmitter board.Step 5. The UART RX/TX signals of the STWBC-MC are accessible on the J400 connector of the transmitter

board.

Figure 9. STEVAL-ISB047V1 evaluation kit connection

Step 6. From the STWBC GUI user interface, select [Setup]>[Load FW to board].

UM2491

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https://www.st.com/en/product/stsw-isb047fw


Figure 10. Firmware download with STSW-STWBCGUI

Step 7. Select the CAB file containing the Firmware to download.file: WBC_FW_ST_MP2_V*.**.cab

Step 8. Power ON the board and keep it powered.Step 9. Follow the download progress in the DOS window and power off the board when prompted.

Figure 11. DOS window: download in progress

Step 10. Run the calibration procedure.The board is not usable until it is calibrated.

RELATED LINKS 5.2 Test procedure for board calibration on page 34

3.2.2 Download procedure with a new chip (never programmed)If for some reason the STWBC-MC is replaced, it will not have been programmed previously, so Download Modeis enabled by default.

Step 1. Connect the USB-to-UART dongle to the computer.

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Do not connect the transmitter board for the moment.Ensure a jumper is placed on the dongle J3 connector to supply the transmitter board via the PC.

Figure 12. Dongle connection

Step 2. From the GUI, select [Setup]>[Load FW to board].

Figure 13. Firmware download with STSW-STWBCGUI

Step 3. Select the CAB file containing the firmware to download.file: WBC_FW_ST_MP"_V*.*.cab

Step 4. Supply the board with 12 V and keep it powered.

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Figure 14. Power on message

Step 5. When the DOS window appears, power the transmitter board on by connecting it to the dongle using amicro-USB cable.Ensure it is connected through USB debug connector J400 (near the power supply connections).

Figure 15. STEVAL-ISB047V1 evaluation kit connection

Step 6. Follow the download progress in the DOS window and power off the board when prompted.

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Figure 16. DOS window: download in progress

Step 7. Run the calibration procedure.The board is not usable until it is calibrated.

RELATED LINKS 5.2 Test procedure for board calibration on page 34

3.3 Erasing firmware procedure using STVPRequirements:• ST-LINK USB driver installed• ST STVP programming tool installed• ST-LINK hardware tools connected to the transmitter board SWIM signals• STVP configured as shown below

UM2491Erasing firmware procedure using STVP

UM2491 - Rev 3 page 16/81

Figure 17. STVP configuration

Follow this procedure if you encounter problems during a firmware update, such as corrupted firmware code.

Step 1. Power OFF the target.Step 2. Power ON the target.Step 3. Connect ST-LINK circuit to the PC via USB.Step 4. Connect the ST-LINK–SWIM cable to the target.

Pay special attention to ensure that the SWIM cable is correctly connected to the transmitter board.Refer to the figure below.


UM2491 - Rev 3 page 17/81

Figure 18. ST-LINK connection on the board

Step 5. Launch STVP software program.Step 6. Select the STM8AF6166 core from the drop-down list at the top.

Figure 19. STVP core selection

Step 7. Do not load any programs into the STVP RAM area as all bits are erased (load 00 00 00 …)Step 8. Transfer the "00 00" to the STWBC-MC through the SWIM interface using the download button.

Figure 20. STVP download

Step 9. Click [OK] if the following message appears.


UM2491 - Rev 3 page 18/81


Figure 21. STVP wrong device selected alert

Step 10. Click [Yes] if the following message appears.

Figure 22. STVP incompatibility device action query

Step 11. After this operation, the programming procedure starts.On completion, the following STVP message appears.

< PROGRAM MEMORY programming completed.> Verifying PROGRAM MEMORY area...< PROGRAM MEMORY successfully verified.

Step 12. Exit the STVP program.Step 13. Disconnect the SWIM cable.Step 14. Power OFF the transmitter board.

Once the procedure is complete, you can proceed to retry the UART download procedure if necessary.


UM2491 - Rev 3 page 19/81

3.4 Firmware download with command line

3.4.1 Firmware download with written chipStep 1. Create a dedicated directory with the following files:

– STWBC_Loader.exe– stwbc_loader_not_empty.bat– enable_boot.bin– “firmware version“.cab

Step 2. From the STSW-STWBCGUI folder, call the "stwbc_loader_not_empty.bat" file from the command line.When you call the batch file, you must also specify:– COM number (e.g. COM2)– File name ("firmware name.cab")

Figure 23. STSW-STWBCGUI command line

3.4.2 Firmware download with blank chipIf the STWBC-MC memory is erased, use the procedure below.

Step 1. Connect the UART cable to the board.

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Step 2. From the STSW-STWBCGUI folder, call the "stwbc_loader_empty.bat" file from the command line.When you call the batch file, you must also specify:– the COM number (e.g., COM6)– the file name (firmware name.cab)

Step 3. Execute the command line as shown in the example below, with the appropriate firmware file name.

Figure 24. STSW-STWBCGUI command line with blank chip

Note: If the COM port is > COM8, use the syntax \\.\COMx, where COMx is the COM port number.

Note: A dedicated tool is available for simultaneous downloads (refer to the STSW-STWBCFWDT firmwaredownloader tool).

3.5 STVP file creationTo use the STVP to download, you must generate new files from the *.cab via the STSW-STWBCGUI.

Step 1. Select the convert CAB to STVP files command from the STSW-STWBCGUI setup menu.

Figure 25. STSW-STWBCGUI: convert CAB to STVP files

Step 2. Follow the prompt to select the appropriate cab file.

UM2491STVP file creation

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http://www.st.com/en/product/stsw-stwbcfwdt


Figure 26. Selecting the CAB file to be converted

Step 3. Follow the prompt to provide the project file name.

Figure 27. Selecting the STVP project file name

Four files are generated as shown below.

Figure 28. STVP project files

Note: Refer to STSW-STWBCFWDT STWBC firmware downloader tool for further details.

3.6 Firmware download with STVPFollow the procedure below to download firmware using the STVP software program.

UM2491Firmware download with STVP

UM2491 - Rev 3 page 22/81


Note: You can also install and use the IAR toolchain to compile and download firmware.

Step 1. Target power OFF.Step 2. Target power ON.Step 3. Connect ST-LINK circuit to the PC via USB.Step 4. Connect the ST-LINK–SWIM cable to the target.

Pay special attention to ensure that the SWIM cable is correctly connected to the transmitter board.Refer to the figure below.

Figure 29. ST-LINK connection on the board

Step 5. Launch STVP software program.Step 6. Select the STM8AF6166 core from the drop-down list at the top.

Figure 30. STVP core selection

Step 7. Go to [Project]>[Open] and select the .stp file provided in the zip file.


UM2491 - Rev 3 page 23/81

Figure 31. STVP open project

Step 8. After a few seconds, the following message should appear.

Loading file program.hex in PROGRAM MEMORY area ...< File successfully loaded. File Checksum 0x1D1205

Note: It is normal for warnings like the ones below to appear:

> Loading file options.hex in OPTION BYTE area ...FILE : line 2: Address 0x4802 is out of range and is ignored!FILE : line 2: Address 0x4804 is out of range and is ignored!

Step 9.Step 10. Select [Program]>[All tabs (on active sectors, if any)]

Figure 32. STVP download

Step 11. Click [OK] if the following message appears

Figure 33. STVP wrong device selected alert

Step 12. Click [Yes] if the following message appears


UM2491 - Rev 3 page 24/81

Figure 34. STVP incompatibility device action query

Step 13. After this operation, the programming procedure starts.Step 14. On completion, the following message appears

< PROGRAM MEMORY programming completed.> Verifying PROGRAM MEMORY area...< PROGRAM MEMORY successfully verified.

Step 15. Exit the STVP software program.Step 16. Disconnect the SWIM cable.Step 17. Power OFF the trnasmitter board.


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4 Setting up the evaluation equipment

Figure 35. Test setup configuration

Halfbridge

Demodulator

POWERTRANSMITTER

Rectifier LDO

Modulator

POWERRECEIVER

A

VIN+_

A

VOUT

12 V

The board is powered with an external power supply or with a USB charger. An electronic load is connected onthe receiver output to provide a load up to 15 W. Voltmeters and ammeters measure input and output voltage andcurrent.

4.1 How to supply power from an external sourceFollow this procedure to supply power from an external power source.

Step 1. Set your power supply:– 12V/2A for EPP Mode– 5V/2A for BPP Mode

Step 2. Set jumper J100 for jack/external power supply input.Step 3. Connect the external power to the board with wires.

Figure 36. Power supply connection

4.2 How to supply power via USBFollow this task to supply power through the USB charger.

UM2491Setting up the evaluation equipment

UM2491 - Rev 3 page 26/81

Warning: Disconnect the PC micro-USB cable before connecting USB-C cable.

Step 1. Set jumper J100 for USB power supply input.Step 2. Select the type of USB charger you are going to use:

– a simple 5V/2A USB charger (BPP mode only)– a 30 W USB-PD wall charger (supports EPP Mode) to provide 15 W on the receiver side. By

default, communication on CC lines selects 20 V on Vbus

Testing by ST was performed using the UGREEN 30W USB-C PD power adapter: Model 127.

Note: It is important to use a good quality USB-C cable between the charger and the board.

Figure 37. Power supply connection1. QC charger2. USB-C cable3. Transmitter4. J100 jumper to select input supply type

1

23

4

4.3 How to set up a UART connectionA UART connection between the board and your PC is necessary to be able to set parameters and monitor thetransmitter board through the STSW-STWBCGUI software.

Step 1. connect the USB connector on the USB to UART cable from the USB to UART dongle on your PC toconnector J400 on the board.

UM2491How to set up a UART connection

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Figure 38. UART connection1. USB to UART dongle2. J400 connector

1

2

UM2491How to set up a UART connection

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5 GUI and evaluation procedure

The STSW-STWBCGUI lets you monitor STWBC-MC operation. The main screen provides transmitter and Qireceiver status information.

Step 1. Launch the STSW-STWBCGUI user interface software.

Figure 39. STSW-STWBCGUI main window1. Transmitter state section2. Power mode indicator3. Protocol and Monitor debug window buttons4. Parameter window button

12

3 4

Step 2. From the launch screen, select the [Protocol window] button.This window shows Rx to Tx communication protocol errors, useful for system debugging.

UM2491GUI and evaluation procedure

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Figure 40. STSW-STWBCGUI Qi protocol window

Step 3. From the launch screen, select the [Monitor window] button.This window lets you monitor STWBC-MC internal variables such as bridge voltage and frequency, Rxreported power, coil temperature, etc.


UM2491 - Rev 3 page 30/81

Figure 41. STSW-STWBCGUI: monitor window

Step 4. From the launch screen, select the [Param window] button.This window lets you adjust system parameters (thresholds, regulation error) and save the settings.The parameters have the following levels of protection:– Level 0: parameters can be modified without protection– Level 1: To modify these parameters, you must first click the [Unlock param] button.

Note: Exercise caution when modifying level 1 parameters, as they can lead to system malfunction and triggerbehavior that is not compatible with the Qi standard.


UM2491 - Rev 3 page 31/81

Figure 42. STSW-STWBCGUI parameter window

Step 5. Change some parameters and test their impact immediately by clicking [Push to target].Modified parameters lose their highlighted background.

Figure 43. STSW-STWBCGUI: parameter modification


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The GUI includes the STSW-STWBCFWDT downloader interface (which uses the UART connection) and includes tools togenerate binary files with your changed parameters and to build new firmware packages with these files. Through the GUI, youcan change the parameters and produce a new cab to program a batch of new boards.

Step 6. In the Parameters window, select [Dump to bin.] to save the changed parameters to a bin file.You should only do this after you have clicked the [Push to target] button.

Figure 44. STSW-STWBCGUI dump modified parameters to a bin file

Step 7. From the launch screen, select [Setup]>[Modify parameters in CAB file] and select the appropriatefirmware CAB file to be patched.This operation will alter the firmware file with new tuning parameters, which can be subsequentlyloaded using the standard procedure.


UM2491 - Rev 3 page 33/81


Figure 45. STSW-STWBCGUI: CAB file patch button

5.1 Status LEDsThe status LEDs give the state of the charge:At startup• Red short blinking: when the board auto-calibration is on-going. You have to wait for the LED to be switched

off before putting a receiver on the surface.• Red and green blinking once: an internal reset occurred.• Red and green steady state: firmware/STWBC chip mismatch• Red steady and after 2 seconds green steady state: board hardware subversion detected does not match

the firmware

In steady state• Green blinking: power transfer in progress• Green steady state: the charge is complete• Red blinking: an error has been detected, as incomplete charge due to battery fault, overvoltage,

overcurrent, etc.• Red steady state: the transmitter is stuck until the receiver is removed, as mentioned in the Qi standard

(power transfer stopped three times in a row due to the amount of power not provided to the receiver, sometypes of end power transfer or no response error code)

UM2491Status LEDs

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5.2 Test procedure for board calibrationImportant:Board calibration is mandatory to ensure that the transmitter board functions properly. You must perform thenecessary calibration routines only once after each new firmware download.

Step 1. In the STWBC GUI launch screen, select [Test]>[Manage test].

Figure 46. Start auto calibration

Proceed with the following test routine:1. Presence detection calibration

5.2.1 Presence detection calibration procedureStep 1. In the Test popup window, insert "1" in the [Test number:] field and click the [Start] button.

Figure 47. Presence detection test

At the end of the test, the [TEST_COMPLETED] field is set in the Protocol window and [Test done] appears inthe [Status:] field of the Test window.

UM2491Test procedure for board calibration

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Figure 48. Test result

If the test completion confirmations do not appear, please start the test again.

Proceed with the following test routine:1. QFOD calibration

5.2.2 QFOD calibration procedureStep 1. In the Protocol window, click the [Clear] button.

This clears the [TEST_COMPLETED] field.

Figure 49. QFOD test

Step 2. In the Test popup window, insert "2" in the [Test number:] field and click the [Start] button.

At the end of the test, the [TEST_COMPLETED] field is set in the Protocol window and [Test done] appears inthe [Status:] field of the Test window.

UM2491Test procedure for board calibration

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Figure 50. Test result

If the test completion confirmations do not appear, please start the test again.

5.3 EfficiencyEfficiency measurements are performed on a Qi certification tester.The STEVAL-ISB047V1T transmitter board is supplied with 12 V/2 A, and the receiver voltage level is 12 V(MP1B).Pout is the actual output power measured at the output of the receiver and Pin is the input power.Efficiency is measured using the configuration setup below:

Figure 51. Efficiency set up

Halfbridge

Demodulator

POWERTRANSMITTER

Rectifier LDO

Modulator

POWERRECEIVER

A

VIN+_

A

VOUT

12 V

The following figure shows the typical efficiency performance on the different coils.

UM2491Efficiency

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Figure 52. Efficiency performanceEfficiency=Pout/Pin.Max efficiency is 75% at 9 W

5.4 Standby consumptionVery low power consumption is achieved in Standby Mode, with the transmitter board supplied 12 V.Device detection is still enabled in this mode, but power consumption is reduced down to 1.4 mA on average. TheSTEVAL-ISB047V1T reference board can operate on a low standby power consumption of only 17 mW.

Note: To measure such low power consumption, the UART cable must be unplugged.

UM2491Standby consumption

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6 Schematic diagrams

6.1 STEVAL-ISB047V1T schematic diagrams

Figure 53. STEVAL-ISB047V1T - circuit schematic (supply)

VIN1

3

X5R

C101

100NF50V

WIRE_SOLDER

C107

10NF

1

PAD

X5R

ST715PUR4.5V

VBUS

VIN_USB_PD

C103

NP

C105

10UF25V

8VOUT

TP100

C110

10NF50V

D100

R102

C100

1

4

NP

X5R

C112

10UF10V

1

X7R

C115

NP

1

C109

100NF25V

X5R

NC

TP103

R101

NC

C104

C108

22UF25V

NP

NC

X5R

5

WIRE_SOLDERC106

100NF50V

1

FB

VDD_STWBC

2.2uH

U100

3

VIN

C102

10UF25V

220K

X5R

J101

L100

12K

X7R

120KR103

C113

100NF25V

2

GND 330K

R100

TP102

X5R

PJ-002A

2

132

76

ESDA25P35-1U1M

9

C114

100NF25V

J100

50VX7R

TP101

X5R

NC

C111

NP

Figure 54. STEVAL-ISB047V1T - circuit schematic (sepic)

5

X7R

X5R 50V

3

47R

X7R

D200

X7R

+

3 VDCDC

C201

22UF25V

C206

100NF50V

4

X7R

4

X7R

C219100NFC0G

10K

X5R

3.3K

WURTH ELEKTRONIK

DCDC_DAC

C216

10PF50V

100K

10K

4

1/2W

X5R

R207

C20210UF

VIN

VTARGET

NPN-PNP

75K

R210

R200 10R

1

C207

5.6NF50V

DCDC_DAC_REF

DEMAGNET

8

C221

10NF50V

6

R214

PMEG045V100EPD

C0G

C212

22UF35V

Q202

R213

X5R

C0G5

470R

R209

L200

2*4.7µH

744871004

VIN

65

7

X5R

6

3

Q201

N-MOS

2

1

DCDC_DRV

C205

100PF50V

R20210R

X7R

C220100PF50V

C211

22UF35V

R211

2

220KR208

Q200

C208

22UF35V

3.3K

C213

22UF35V

3

1

VIN

C204

TANTX5R

C209

22UF35V

R204

2

CS_CMP

X5R

NP

D201

4.7K

R205

1

R201

NP

R212

4.3V

Isat>6A, Rdc=23mOhms

C210

22UF35V

1

TP200

X5R

2

R2060.033R

C200

22UF25V

NPN-PNP

C214

47UF35V

50V

C222

C217220NF16V

STL8DN6LF3

50V

C20310UF

X5R

C218220NF16V

NP

R2031K

4

X5R

CMP_OUT_V

UM2491

UM2491 - Rev 3 page 39/81

Figure 55. STEVAL-ISB047V1T - circuit schematic (bridge)

Direct GND lineconnection

N-MOSSTL10N3LLH5

VDCDC

2 3

LDRV

0.022R

7

PWMHI

5

VRSENSE

PWM_QFOD

U300

R300 22R

PHASE

HIGHDRV HDRV

BRIDGE_NODE

D3

D300NP

1

VCC

VDCDC

MCP14700

8

C303 100NF

25V

VDD_STWBC

GND POWER

22R

X7R

Q301

Q3004

LOWDRV

R303NP

X5R

BOOT

3

UPBL

16 7 8

6 7 8

4TH9

1

DNBL

PHASE

N-MOSSTL10N3LLH5

BOOT

1

5

C302

NP

1

G

1

R304

2 3

X7R

46

GND

N-MOS2N7002

S2

2

PWMLO

Q302

C3011µF10V

C3041NF50V

TP301

TP300

5

R301 22R

R302

Figure 56. STEVAL-ISB047V1T - circuit schematic (controller)

SHELL7USBDM 3

COIL_TEMP 19

31

10R

1

TP400

R405

1K

R404

X5R

SI2 Q4

14

R403

I2C_SDA

VDD_STWBC

DEMAGNET

TP406

J400

ISENSE

R411 470R

C403

1UF16V

GREEN

R400

14

RESET

TP404

17QFOD_ADC 18

R412470R

R402

28 SWIM27

21

C401100NF25V

1KL401

VSS

33

TP402

1M

Q6

10R

12

Q7

COIL_1_SEL

X5R

U401

Q15

1

180K

UART_TX1

C405100NF25V

R410

30

VSSA

16VTARGET

COIL_3_SEL

R414

R408100K

15

15

X5R

VDD_STWBC

61300411121

1

VBUS

VDD_STWBC

D401

VDD_STWBC

SK3

1

SWIM

TANK_VOLTAGE

DNBL DNBL2

Q26

STROBE_SR

100K

USB_GND

6

DCDC_DAC

TP401

X5R

QC_IO

NRST

OE

9

M74HC4094YTTR

VDD_STWBC

CMP_OUT_V 9CMP_OUT_V

CS_CMP

I2C_SCL

DNBL

SYMBOL_DETECT

SHELL

1

11

QS19

629105150521

22DEMAGNET 23

R406

VDD

16

26DNBL_FB 3

I2C_SCL

CURRENT_DEMOD

USBDP5

I2C_SDA

D400

ID4

R401

USB_DMVDD_STWBC

SWIM

USB_VCC 2

DCDC_DRV

7

10K

VTARGET

X7R

Q04

100K

X5R

DCDC_DRV24

RED

PWM_QFOD

UART_RX6LED

ST1

R415

11WAVE_SNS

SHELLUSB_DP

R409

C400100NF

25V

NTC

TANK_VOLTAGE

I2C_SCL

TP405

10

R407

U400

C40410NF50V

I2C_SDA 4

STROBE_SR

QC_IO

Q37

100K

1

VOUT

29

VDD

A13

J401

1234

1KL400

STWBC-MCDigital Controller

47K

R413470K

COIL_2_SEL

1

UPBL

VSS

8

VDD_STWBC

VDD

STWBC_MC

VDD_STWBC

255 CS_CMP

QFOD_ADC

SYMBOL_DETECT

VDD_STWBC

20VMAIN

8

SHELL8

10DCDC_DAC_REF

WAVE_SNS12CURRENT_DEMOD

DCDC_DAC_REF

TP403

VSS

QS2

ISENSE

USB for UART Debug

PWM_QFOD

32

DCDC_DACUPBL

RESET1

Q513

10K

C402100NF25V

10K

UM2491Schematic diagrams

UM2491 - Rev 3 page 40/81

Figure 57. STEVAL-ISB047V1T - circuit schematic (sensing)

470K

R5076

RB520S

1MR505

C5031nF50V

X7R

IDEMOD

X7R

X7R

2C50122nF50V

Q500A

VDD_STWBC

R5041

R5001M

4

100K

10R

470K

R506

470K

R508

ISENSE

5

QFOD_SENSE

VRSENSE

R501

3

C5022.2nF100V

R502

0R

X7R

C5044.7nF50V

VDD_STWBC

C500

470pF50V

One package

10K

VDD_STWBC

R503

Q500B R509

X7R

47K

QFOD_ADC


UM2491 - Rev 3 page 41/81

Figure 58. STEVAL-ISB047V1T - circuit schematic (demod)

X5R

C0G

X7R

R608

VDD_STWBC

2

22KX7R

330R

4

VDD_STWBC

470K

1R610

1M

VDD_STWBC

BC847CDW1T1G

R600

3

C605220NF16V

C609

100NF50V

V+ 5

NODE_SYMBOL_DETECT

CURRENT_DEMOD

R601

22K

R606

IDEMOD

5

6

C611

100NF50V

-IN

C0G

3

100K

3

+

-

C6034.7NF50V

OUT

R604

1

100K

R611

2

R612

TP601

R6092.2K

X5R

BAV99W

1

X7R

47K

Q600B

NPN-NPN

TP600

U600

D600

C60122PF50V

TSV521ICT

C607

2.2UF25V

C60822PF50V

C606

100NF25V

C0G

R602

BC847CDW1T1G

R613

VDD_STWBC

R605 SYMBOL_DETECT

V-

150K

100K

Q600A

NPN-NPN

X5R

2

X5R

+IN

C600100PF50V

4

1

1

1MR603

C610220PF50V

470K


UM2491 - Rev 3 page 42/81

Figure 59. STEVAL-ISB047V1T - circuit schematic (mechanical parts)

M724

M708

TP709TP710

TP711

M717

M719

M713

M316 KRSTMCZ100

TP701TP702

M725

HTSB-M3-20-5-1

M705

M702

D01475

M730

1112

HTSB-M3-20-5-1

TP712

00000

00000

00000

00000

000000

000000

000000

000000

000000

000000

0000

0000

0000

0000

1

1

D01475

10

123456789

13

M720

1TP703

12MNx0,6MNx33MDOUBLE COAT ACRYLIC FOAM ADHESIF TAPE

D01475

M718

D01475

M718

M3- HFST-Z100-

1819

0000000

0000000

0000000

0000000

0000000

0000000

000000

000000

000000

000000

000000

000000

M706

SPACER_3MM_MP_A8_TOP

M711

1

M710

TP707

0000000

0000000

0000000

0000000

0000000

0000000

HTSB-M3-20-5-1

TP705

M704

1

M700

M316 KRSTMCZ100

HOLE_3.2MM_6

20

M3- HFST-Z100-

0000

0000

0000

0000

D01475

HOLE_3.2MM_6

TP713

M3- HFST-Z100-

M707

1

16

TP700

1

M316 KRSTMCZ100M316 KRSTMCZ100

1

M3- HFST-Z100-

M722

000000

000000

000000

000000

000000

000000

SPACER_3MM_MP_A8_BOTTOM

1

TP704

000000

000000

000000

000000

000000

000000

1

61302011121

OPTICAL_TARGET

1

M721

HTSB-M3-20-5-1

OPTICAL_TARGET

M715

M703

17

000000

000000

D01475

M719

M701

000000

000000

000000

000000

000000

000000

M728

WM_REV_01

TP708

000000

000000

000000

000000

M727

M316 KRSTMCZ100

M726

M723

M712

M716

1

1

HOLE_3.2MM_6

M720

1

TP706

M316 KRSTMCZ100

D01475

M729

14

HOLE_3.2MM_6

J700

NP

M316 KRSTMCZ100

D01475

M721

M714 15

OPTICAL_TARGET

M709

M316 KRSTMCZ100


UM2491 - Rev 3 page 43/81

Figure 60. STEVAL-ISB047V1T - circuit schematic (USB-PD)

623723300011

5

GN

D3

CC1DB8

SDA

23

C802

100NF25V

B12

D+2B6

5

CC1A5

Q802B

A_B_SIDE 11

GND

R809

A12TX-2

U800

STUSB4500

C8041UF50V

20

19

VDD_STWBC

CC2

P-MOSSTL6P3LLH6

16

21

ESDA25W

X5R

VDD

R808

VREG

_2V7

A1

TX+1A2

5

R804

I2C_SDA

6

3

6

Control Quick Charge :Vin request 5 volts : QC_IO=0Vin request 9/12 volts : QC_IO=1

B5

1

24

2

B3B2

TX+2

Q800

100K

POWER_OK2

VIN_USB_PD

1

X5R

3

X5R

R802A3

C801

1UF50V

B11

RX-1

>0.5W

RESET USB : connected only to STUSB4500

I2C_SCL

X5R

R813

D800

TP800

QC_IO

RX-2

DISCH15

G

D

S

D+

GPIO

Q801P-MOS

GN

D2

GN

D

R805

VREG

_1V2

NPN-NPN

R806

33K

VBUS

D-2

2

R810

VDD_STWBC

25EP

AD

NC

3

RX+1

VBUS_VS_DISCH

3

ATTACH

1

10R

10K

VDD_STWBC

1

VBUSB4

GNDG

ND

NPN-NPN

8

10R

39K

7

R807

B7

CC2

1

TP801

A7

Sbu1A8A9

Vbus

4

D-

0R

R800

5

CC1

100K

R814

2

GN

DG

ND

4

R811

100K

7

13ADD1

6

R801

6

B10B9

VBUS

CC2

GND

2.2K

R812

VDD_STWBC

VSYS

22

D+1

D801

GN

D10

7

100K

CC2DB

SCL

D+

ESDA25P35-1U1M

39K

GN

D

R803

D+NP

RESET

NPC800

STL6P3LLH6

3

GN

D1

GN

D

1

J800USB_TYPE_C

4

1814

A6

D-1

SH4

C8054.7UF50V

2

B1

GND

470R

D-

1

C803

1UF50V

POWER_OK1 17

SH1

GN

DSH

2A11

12ADD0

4

GN

D

2CC14

A10

RX+2

RESET_USB

100K

TX-1VBUS

A4

R810

R811

R812

22K

47K

39K100K

VIN 9V 12V

Vin choice : 9V or 12V

X5R

Q802A

SH3

GN

D

G

D

S8

D-

VBUS_EN_SNK 9

B8Sbu2

ALERT

NP

100K

Figure 61. STEVAL-ISB047V1T - circuit schematic (coil 1)

MMBD1503A

R908

C900100NF100V

1

R904

6 7 8

82K82K

R909

1K BAS521-7

D900

C0G

4

C904100NF

2

BRIDGE_NODE

X7R

QFOD_SENSE

2.7K

470R R905

R900

1

R906

BC847CWT1G 3

C903

4.7NF100V

C902100NF100V

VOLTAGE SENSING

QFOD SENSING

VOLTAGE DEMOD

WAVE SENSE MUX

X7R

100K

C907

22NF100V

1

R907

3

BAS521-7

R902

25VX5R

R903

2

COIL_1_SEL

COIL POWER

All caps : P/N =

X7R

C0G

BAV99W

1

C906

470PF100V

COIL_1_SEL

X7R

2

X7R

2

C0G

3

X7R

2 3

Q900

NODE_SYMBOL_DETECT

TANK_VOLTAGE

COIL_1_SEL

Q902

NPN

C90922NF50V

1M

1C0G

C908

10NF100V

C911680PF50V

D902C905100PF50V

D903

3

470K

5

N-MOS

BC847CWT1G

X7R

C901100NF100V

TP900

C9101NF100V

1

TP901

10K

GND POWER

1

Q901

NPN

1 2

10K

R901

M900Acoil A:8.5uH - coil B:7.5uH - coil C:8.5uH

WAVE_SNS

D901


UM2491 - Rev 3 page 44/81

Figure 62. STEVAL-ISB047V1T - circuit schematic (coil2)

BC847CWT1G

2

C1001100NF100V

X7R

1470R

R1008

3

1

X5R

TP1001

R1007

QFOD SENSING

VOLTAGE DEMOD

WAVE SENSE MUX

Q1000

C1003

4.7NF100V

3

C1006

470PF100V

X7R

WAVE_SNS

R1009

2

C100922NF50V

C0G

X7R

N-MOS

5All caps : P/N =

82K82K

C1008

10NF100V

R1003

X7R

C0G

BAS521-7

R1006

R1000

D1001

C1011 33NF100V

4

COIL POWER

1K

GND POWER

D1000

R1005

3

TANK_VOLTAGE

COIL_2_SEL

C1002100NF100V

BAV99W

1

C0G

1

100K

COIL_2_SEL

C1012680PF50V

3C1007

22NF100V

BAS521-7

TP1000

X7R

C1000100NF100V

BC847CWT1G

NODE_SYMBOL_DETECT

Q1001NPN

C0G

BRIDGE_NODE

2 3

MMBD1503A

2.7K

R1004

1

X7R

C10101NF

M900Bcoil A:8.5uH - coil B:7.5uH - coil C:8.5uH

100V

1

Q1002

NPN

COIL_2_SEL

3

2

10K

1

6 7 8

470K

1M

D1003

R1002 R1001

C1005100PF50V

2

VOLTAGE SENSING

X7R

4QFOD_SENSE

10K

C0G

C1004100NF25V

D1002


UM2491 - Rev 3 page 45/81

Figure 63. STEVAL-ISB047V1T - circuit schematic (coil3)

D1101

TP1100

C1107

22NF100V

QFOD_SENSE

X7R

82K

M900Ccoil A:8.5uH - coil B:7.5uH - coil C:8.5uH

R1108

C1100100NF100V

3

1

2 3

R1105

C110922NF50V

C0G

Q1101

NPN

2

1QFOD SENSING

VOLTAGE DEMOD

WAVE SENSE MUX

C1101100NF100V

1

TANK_VOLTAGE

COIL_3_SEL

5

2

NODE_SYMBOL_DETECT

10K

COIL POWER

BC847CWT1G

1

3

C11101NF100V

All caps : P/N =

3

X5RGND POWER

X7R

R1104

D1103

470R R1101

Q1100

BAS521-7

R1106

X7R

X7R

1M

1K

R1109

82K

COIL_3_SEL

6

C1102100NF100V

MMBD1503A

2

R1102

BAS521-7

C1106

470PF100V

COIL_3_SEL

6 7 8

C0G

C0G R1107

1C1108

10NF100V

R1100

4

C1111680PF50V

2.7K

R1103

10K

C1105100PF50V

BRIDGE_NODE

3

D1100

TP1101

1

1

100K

C1103100NF25V

470K

N-MOS

5

VOLTAGE SENSING

X7R

X7R

C0G

2

C1104

4.7NF100V

WAVE_SNS

BAV99W

D1102

X7R

Q1102

NPN

BC847CWT1G


UM2491 - Rev 3 page 46/81

6.2 STEVAL-WBCDNGV1 schematic diagrams

Figure 64. STEVAL-WBCDNGV1 circuit schematic

USB

5V

IO Voltage Selection(3V3 / 5V)

VBUS_USB_MASTER

VSS VSSVSS

VSS

VSS

VSS

VSS

VCC_IO

VCC_IO

VCC_IO

VSS

VSS

VSS VSS

VSS

VBUS_USB_MASTER

VBUS_DGL

VBUS_DGL

VSS

C447PF

D1

I/O1#11

GND2

VBUS5

I/O2#44

I/O1#66

I/O2#33

R2

R8

R10

J1

VBUS1

USBDM2USBDP3

GND4

SHELL15

SHELL48

SHELL26

SHELL37

C7100NF

R3

C310NF

R410K

R6

J261400416021

USB_VCC1

USBDM2

USBDP3

USB_GND4

SHEL

L15

SHEL

L26

C6100NF

C547PF

U1

TXD1

DTR#2

RTS#3

VCCIO4

RXD5

RI#6

GND17

NC18

DSR#9

DCD#10

CTS#11

CBUS412

CBUS213

CBUS314

OSCO28

OSCI27

TEST26

AGND25

NC224

CBUS023

CBUS122

GND221

VCC5I20

RESET#19

GND18

3V3OUT17

USBDM16

USBDP15

C210µF

J3

R1

R9

L1

C1100NF

R11

R510K

R7

TXD

VCC3O

RXD

USBDM_DONGLE

USBDP_DONGLE

VBUS ExternalPower SupplyConnector

48037-0001

USBLC6-2SC60R

120R

0R

0R

0R

3V3

NP

FT232R

330 R

330 R

NP

NP

22-28-4023_C


UM2491 - Rev 3 page 47/81

7 Bill of materials

7.1 STEVAL-ISB047V1 bill of materials

Table 4. STEVAL-ISB047V1 bill of materials

Item Q.ty Ref. Part / Value Description Manufacturer Order code

1 1 - STEVAL-ISB047V1T

Qi 3-coil 15W wirelesscharger TX board ST not available separately

2 1 - STEVAL-WBCDNGV1 Dongle USB To UART ST not available separately

3 1 - 12 V, 24 WAC/DC External WallMount Adapter Multi-Blade (Included) Input

XP Power VER24US120-JA

4 1 - 1 m length,black

USB Type A Plug toMicro USB Type BPlug, USB 2.0

Molex 68784-0001

7.1.1 STEVAL-ISB047V1T bill of materials

Table 5. STEVAL-ISB047V1T bill of materials


1 2 C100, C103 NP CER, 603 any -

2 4 C101, C106,C609, C611

100nF, 50V,15% CER, 402 any -

3 2 C102, C105 10µF, 25V, 20% CER, 1206 WURTHELECTRONIK 885012108021

4 1 C104 NP CER, 1210 any -

5 4 C107, C110,C221, C404 10nF, 50V, 10% CER, 402 any -

6 3 C108, C200,C201 22µF, 25V, 20% CER, 1210 WURTH

ELECTRONIK 885012109014

7 12

C109, C113,C114, C400,C401, C402,C405, C606,C802, C904,C1004, C1103

100nF, 25V,15% CER, 402 any -

8 5C111, C115,C204, C222,C800

NP CER, 402 any -

9 1 C112 10µF, 10V, 10% CER, 805 MURATA GRM21BR71A106KE51L

10 2 C202, C203 10µF, 50V, 10% CER, 1206 any -

11 6C205, C220,C600, C905,C1005, C1105

100pF, 50V, 5% CER, 402 any -

12 1 C206 100nF, 50V, 5% CER, 603 MURATA GRM188R71H104KA93D

13 1 C207 5.6nF, 50V, 15% CER, 402 any -

UM2491

UM2491 - Rev 3 page 48/81


14 6C208, C209,C210, C211,C212, C213

22µF, 35V, 20% CER, 1210 Taiyo Yuden GMK325BJ226MM-P

15 1 C214 47µF, 35V, 20% TANT KEMET T495X476M035ATE185

16 1 C216 10pF, 50V, 15% CER, 402 any -

17 3 C217, C218,C605

220nF, 16V,10% CER, 402 any -

18 1 C219 100nF, 50V, 5% CER, 1206 TDK CGA5L2C0G1H104J160AA

19 1 C301 1µF, 10V, 15% CER, 603 any -

20 1 C302 NP, 50V, 15% CER, 402 any -

21 1 C303 100nF, 25V,10% CER, 603 any -

22 1 C304 1nF, 50V, 15% CER, 603 any -

23 1 C403 1µF, 16V, 10% CER, 402 any -

24 1 C500 470pF, 50V,15% CER, 402 any -

25 4 C501, C909,C1009, C1109 22nF, 50V, 15% CER, 402 any -

26 1 C502 2.2nF, 100V,10% CER, 603 AVX 06031C222KAT2A

27 1 C503 1nF, 50V, 10% CER, 402 any -

28 2 C504, C603 4.7nF, 50V, 15% CER, 402 any -

29 2 C601, C608 22pF, 50V, 5% CER, 402 any -

30 1 C607 2.2µF, 25V, 10% CER, 402 any -

31 1 C610 220pF, 50V,15% CER, 402 any -

32 3 C801, C803,C804 1µF, 50V, 10% CER, 402 any -

33 1 C805 4.7µF, 50V, 15% CER, 805 any -

34 9

C900, C901,C902, C1000,C1001, C1002,C1100, C1101,C1102

100nF, 100V,5% CER, 1812 TDK C4532C0G2A104J320KA

35 3 C903, C1003,C1104

4.7nF, 100V,10% CER, 603 TDK CGA3E2X7R2A472K080AA

36 3 C906, C1006,C1106

470pF, 100V,15% CER, 402 any -

37 3 C907, C1007,C1107

22nF, 100V,15% CER, 603 any -

38 3 C908, C1008,C1108

10nF, 100V,15% CER, 603 any -

39 3 C910, C1010,C1110 1nF, 100V, 15% CER, 402 any -

40 3 C911, C1012,C1111

680pF, 50V,15% CER, 402 any -

41 1 C1011 33nF, 100V, 5% CER, 1210 any -

UM2491STEVAL-ISB047V1 bill of materials

UM2491 - Rev 3 page 49/81


42 2 D100, D800 - TVS/ESD/EMI,QFN1610 ST ESDA25P35-1U1M

43 1 D200 - SCHOTTKY,SOT1289 NXP PMEG045V100EPD

44 1 D201 4.3V ZENER, SOD323 NXP BZX384-C4V3-AK

45 1 D300 NP DIODE, SOD323 any -

46 1 D400 RED LED, L3.2_W2.5_H1 WURTHELEKTRONIK 155124RS73200

47 1 D401 GREEN LED, L3.2_W2.5_H1 WURTHELEKTRONIK 155124VS73200

48 1 D500 - SCHOTTKY, SOD523 ROHM RB520S

49 4 D600, D903,D1003, D1103 - DIODE, SOT323 NXP BAV99W

50 1 D801 - TVS/ESD/EMI,SOT323 ST ESDA25W

51 6D900, D901,D1000, D1001,D1100, D1101

- DIODE,DIOD_SOD523 any BAS521-7

52 3 D902, D1002,D1102 - DIODE, SOT23 FAIRCHILD MMBD1503A

53 1 J100 -HEADER,TH_HEADER_1x3_P2.54

WURTHELEKTRONIK 61300311121

54 1 J101 - JACK, POWER JACKDC CUI PJ-002A

55 1 J400 - USB, MICRO USBTYPE B SMD


56 1 J401 -HEADER,TH_HEADER_1x4_P2.54


57 1 J800 USB_TYPE_C USB, USB TYPE C WURTHELEKTRONIK 623723300011

58 1 L100 2.2µH, 3.8A ,20%

INDUCTOR,L5_W5_H4


59 1 L200 2*4.7µH, 8A CM_CHOKE WURTHELEKTRONIK 744871004

60 2 L400, L401 1K, 0.2A, 25% FERRITE, 402 MURATA BLM15AG102SN1D

61 1 M700 WM_rev3 PCB any PCB WM - 2 layers

62 1 M708 - SPACER any -

63 1 M709 - SPACER any -

64 4 M710, M711,M712, M713 - SPACER RS HTSB-M3-20-5-1

65 8

M714, M715,M716, M717,M718, M719,M720, M721

- SCREW DURATOOL M316 KRSTMCZ100

66 8

M718, M719,M720, M721,M722, M723,M724, M725

- SPACER DURATOOL D01475


UM2491 - Rev 3 page 50/81


67 4 M726, M727,M728, M729 - SCREW DURATOOL M3- HFST-Z100-

68 1 M730 12mm x 33mm SPACER 3M GPH-060GF 12MMX33M

69 1 M900coil A:8.5uH -coil B:7.5uH -coil C:8.5uH, 9A

INDUCTOR WURTHELEKTRONIK 760 308 103 147

70 2 Q200, Q202 NPN-PNP CMS, SOT363ONSEMICONDUCTOR

MMDT4413

71 1 Q201 N-MOS CMS,POWERFLAT-5x6 ST STL8DN6LF3

72 2 Q300, Q301 N-MOS CMS,POWERFLAT-3x3 ST STL10N3LLH5

73 1 Q302 N-MOS CMS, SOT23ONSEMICONDUCTOR

2N7002

74 3 Q500, Q600,Q802 NPN-NPN CMS, SOT363

ONSEMICONDUCTOR

BC847CDW1T1G

75 2 Q800, Q801 P-MOS CMS, L3_W3_H0.75 ST STL6P3LLH6

76 3 Q900, Q1000,Q1100 N-MOS CMS,

POWERPAK_SO_8 VISHAY SIR616DP-T1-GE3

77 6Q901, Q902,Q1001, Q1002,Q1101, Q1102

NPN CMS, SOT323ONSEMICONDUCTOR

BC847CWT1G

78 2 R100, R207 220K, 1/16W,1% RES, 402 any -

79 1 R101 12K, 1/16W, 1% RES, 402 any -

80 1 R102 330K, 1/16W,1% RES, 402 any -

81 1 R103 120K, 1/16W,5% RES, 402 any -

82 7

R200, R202,R414, R415,R509, R809,R813

10R, 1/16W, 5% RES, 402 VISHAY 10R_5%_0402

83 2 R201, R810 NP RES, 402 any -

84 1 R203 1K, 1/16W, 1% RES, 402 any -

85 10

R204, R405,R406, R408,R410, R804,R805, R806,R807, R811

100K, 1/16W,5% RES, 402 any -

86 4 R205, R900,R1000, R1100

470R, 1/16W,1% RES, 402 any -

87 1 R206 0.033R, 1/2W,1% RES, 1206 any -

88 1 R208 47R, 1/16W, 5% RES, 402 any -

89 1 R209 75K, 1/16W, 1% RES, 402 any -

90 2 R210, R213 3.3K, 1/16W,1% RES, 402 any -


UM2491 - Rev 3 page 51/81

https://www.st.com/en/product/stl8dn6lf3

https://www.st.com/en/product/stl10n3llh5

https://www.st.com/en/product/stlp3llh6


91 3 R211, R212,R508 10K, 1/16W, 1% RES, 402 any -

92 1 R214 4.7K, 1/16W,1% RES, 402 any -

93 2 R300, R301 22R, 1/16W, 1% RES, 402 any -

94 1 R302 0.022R, 1W, 1% RES, 1206 any -

95 1 R303 NP, 1/16W, 5% RES, 402 any -

96 1 R304 22R, 1/10W, 5% RES, 603 any -

97 10

R400, R401,R402, R801,R903, R904,R1003, R1004,R1103, R1104

10K, 1/16W, 5% RES, 402 any -

98 5R403, R610,R902, R1002,R1102

1M, 1/16W, 5% RES, 402 any -

99 4 R404, R909,R1009, R1109 1K, 1/16W, 5% RES, 402 any -

100 1 R407 180K, 1/16W,1% RES, 402 any -

101 1 R409 47K, 1% THERMISTANCE,402 MURATA NCP15WB473F03RC

102 2 R411, R412 470R, 1/16W,5% RES, 402 any -

103 4 R413, R908,R1008, R1108

470K, 1/16W,5% RES, 402 any -

104 3 R500, R505,R603 1M, 1/16W, 1% RES, 402 any -

105 2 R501, R601 47K, 1/16W, 1% RES, 402 any -

106 1 R502 0R, 1/16W, 5% RES, 402 any -

107 5R503, R504,R507, R600,R602

470K, 1/16W,1% RES, 402 any -

108 7

R506, R604,R606, R611,R906, R1006,R1106

100K, 1/16W,1% RES, 402 any -

109 2 R605, R612 22K, 1/16W, 1% RES, 402 any -

110 1 R608 150K, 1/16W,1% RES, 402 any -

111 2 R609, R802 2.2K, 1/16W,5% RES, 402 any -

112 1 R613 330R, 1/16W,5% RES, 402 any -

113 1 R800 0R, 1/10W, 5% RES, 603 any -

114 1 R803 470R, 1/2W, 1% RES, 1206 any -

115 1 R808 39K, 1/16W, 1% RES, 402 any -

116 1 R812 39K, 1/16W, 5% RES, 402 any -

117 1 R814 33K, 1/16W, 1% RES, 402 any -


UM2491 - Rev 3 page 52/81


118 6R901, R905,R1001, R1005,R1101, R1105

82K, 1/16W, 1% RES, 402 any -

119 3 R907, R1007,R1107

2.7K, 1/16W,1% RES, 402 any -

120 2 TP100, TP101 WIRE_SOLDER TEST POINT any -

121 16

TP102, TP103,TP200, TP300,TP301, TP400,TP401, TP402,TP403, TP404,TP405, TP406,TP600, TP601,TP800, TP801

- TEST POINT any TPSMD-1MM

122 6

TP900, TP901,TP1000,TP1001,TP1100,TP1101

- TEST POINT any TPSMD-2x5MM

123 1 U100 - CONVERTER,DFN8_L3_W3 ST ST715PUR

124 1 U300 - DRIVER,DFN8_L3_W3 MICROCHIP MCP14700_DFN8

125 1 U400 - CONTROLLER,QFN32 ST STWBC-MC

126 1 U401 - LOGIC, TSSOP16 ST M74HC4094YTTR

127 1 U600 - AMPLIFIER, SOT353 ST TSV521ICT

128 1 U800 - CONTROLLER,QFN24 ST STUSB4500

129 1 J700 NPHEADER,TH_HEADER_1x20_P2.54


130 12

TP700, TP701,TP702, TP703,TP704, TP705,TP706, TP707,TP708, TP709,TP710, TP711

- TEST POINT, any TPSMD-1x3MM

7.1.2 STEVAL-WBCDNGV1 bill of materials

Table 6. STEVAL-WBCDNGV1 bill of materials

Item Q.ty Ref. Part/Value Description Manufacturer Order code

1 3 C1, C6, C7 100 NF 50 V±15%

Ceramic capacitors,X7R, 0603 any -

2 1 C2 10 µF 25 V±10%

Ceramic capacitorX7R, 0805 any -

3 1 C3 10 NF 50 V±15%

Ceramic capacitor,X7R, 0603 any -

4 2 C4, C5 47 PF 25 V 0.15 Ceramic capacitors,X5R, 0603 any -


UM2491 - Rev 3 page 53/81

https://www.st.com/en/product/st715


https://www.st.com/en/product/m74hc4094

https://www.st.com/en/product/tsv521

https://www.st.com/en/product/stusb4500

Item Q.ty Ref. Part/Value Description Manufacturer Order code

5 1 D1 -Very low capacitanceESD protection -SOT23-6L

ST USBLC6-2SC6

6 1 J1 - USB Molex 48037-0001

7 1 J2 - USB WurthElektronik 61400416021

8 1 J3 JUMP254P-M-2 Header Molex 22-28-4023_C

9 1 L1 120 R 0.5 A±25% Ferrite, 0603 Wurth

Elektronik 74279262

10 4 R1, R2, R3, R11 0 R 1/10 W ±5% Resistors, 0603 any -

11 2 R4, R5 10 K 1/10 W±5% Resistors, 0603 any -

12 2 R6, R9 330 R 1/10 W±5% Resistors, 0603 any -

13 3 R7, R8, R10 NP Resistors, 0603 any -

14 1 U1 FT232RSSOP28 Converter FTDI FT232R


UM2491 - Rev 3 page 54/81

http://www.st.com/en/product/usblc6-2

8 Board assembly and layout

The STEVAL-ISB047V1T evaluation board uses a low cost 2-layer PCB design with all the components on the topside. The test points allow user evaluation of the STWBC-MC solution with probes. In addition, UART isaccessible through a micro USB connector and SWIM is routed to a header connector.

UM2491Board assembly and layout

UM2491 - Rev 3 page 55/81


Figure 65. STEVAL-ISB047V1T evaluation board functional blocks1. Test point for debugging only (may be removed)2. LED, SWIM and USB/UART debug connectors3. Sensing detection circuits4. Coil selection and detection5. STWBC-MC6. USB PD/QC IO charger7. Voltage/current demodulation circuits8. Half bridge driver and LC Tank circuit9. Jack power supply connections and input filtering10. Sepic circuit11. LDO

1

23

4

65

7 8

9

11

10

UM2491Board assembly and layout

UM2491 - Rev 3 page 56/81

8.1 Power signals (SEPIC, GND, LC)

Figure 66. STEVAL-ISB047V1T power signal routing1. Large tracks for high current circuits from power supply2. Large GND tracks with many vias for high power circuits3. Large tracks for high current circuits (booster, half bridge, LC tank, coil connection)

1 2

3

UM2491Power signals (SEPIC, GND, LC)

UM2491 - Rev 3 page 57/81

Figure 67. Ground plan1. Full GND plan on Layer 2 (white area)2. A few noisy signals routed partially on this layer (PWM, etc.)3. Bridge and coil connection

1

2 3


UM2491 - Rev 3 page 58/81

Figure 68. Supply and Vin routing details1. V Jack2. VIN: L100 directly to C200 C201 and L2003. Vin USB PD4. Supply from J100: connected with capacitors (C100 to C105) and L1005. Vin connection to LDO input

X5R 50V

3

C201

22UF25V 4X5R

C20210UF

VIN

L200

2*4.7µH

744871004

X5R

2 1

C200

22UF25V

C20310UF

VIN1

3

X5R

C101

100NF50V

WIRE_SOLDER

C107

10NF

PAD

X5R

ST715PUR

VBUS

VIN_USB_PD

C103

NP

C105

10UF25V

VOUT

TP100

C110

10NF50V

D100

C100

1

4

NP

X5R

1

X7R

1

C109

100NF25V N

C

R101

NC

C104

C108

22UF25V

NP

NC

X5RWIRE_SOLDER

C106

100NF50V

1

FB

2.2uH

U100

3VIN

C102

10UF25V

220K

J101

L100

12K

2

GND

R100

TP102

X5R

PJ-002A

2

132

76

ESDA25P35-1U1M

9

J100

50VX7R

TP101

X5R

NC

Net VIN

Net L200 D201 - Q203

Net D201 – C205

Net Q203R205

1

2

3

4

4

5


UM2491 - Rev 3 page 59/81

Figure 69. Details on Power GND routing1. TP101: large GND2. All caps connected to GND bottom side with many vias3. GND of LDO with large trace (needed for thermal reasons)

X5R

C101

100NF50V

WIRE_SOLDER

VIN_USB_PD

C103

NP

C105

10UF25V

TP100

D100

C100

NP

1

1C104

NP

X5RWIRE_SOLDER

1

2.2uH

3C102

10UF25VJ101

L1002

X5R

PJ-002A132

ESDA25P35-1U1M

J100

TP101

VIN1

3

1

PAD

ST715PUR4.5V

8VOUT

C110

10NF50V

R1024

X5R

C112

10UF10VX7R

C115

NP

C109

100NF25V

X5R

NC

TP103

NC

C108

22UF25V N

C

5FB

VDD_STWBC

U100

X5RX7R

120KR103

C113

100NF25V

GND 330K

2 769

C114

100NF25VX5R

NC

C111

NP

12

3


UM2491 - Rev 3 page 60/81

Figure 70. Details DCDC routing1. Q201 - R2062. L200 & C202 &C203 &C219 & Q2013. Connect L200 – C202-C203-C219 & D2004. DCDC: D200-C206 to C214 and Q300 –Q302

VDCDC

2 3

PWM_QFOD

R300 4.7R

D3

D300NP

VDCDC

C303 100NF

25V

22R

Q3004

R303NP

16 7 8

N-MOSSTL10N3LLH5

1

C302

NP

G

R304

X7R

N-MOS2N7002

S2

Q302

5

5

X7R

X5R 50V

3

47R

X7R

D200

+

3 VDCDC

C201

22UF25V

C206

100NF50V

4

X7R

4

X7R

C219100NFC0G

10K

X5R

WURTH ELEKTRONIK

C216

10PF50V

100K

4

1/2W

X5R

R207

C20210UF

VIN

VTARGET

NPN-PNP

75K

R210

R200 10R

1

C207

5.6NF50V

DEMAGNET

8

C221

10NF50V

6

PMEG045V100EPD

C0G

C212

22UF35V

Q202

X5R

C0G5

470R

R209

L200

2*4.7µH

744871004

VIN

65

7

X5R

6

3

Q201

N-MOS

2

1

DCDC_DRV

C205

100PF50V

R20210R

C220100PF50V

C211

22UF35V

R211

2

220KR208

Q200

C208

22UF35V

3.3K

C213

22UF35V

3

1

VIN

C204

TANTX5R

C209

22UF35V

R204

2

CS_CMP

X5R

NP

D201

R205

1

R201

NP

4.3V

C210

22UF35V

1

TP200

X5R

2

R2060.033R

C200

22UF25V

NPN-PNP

C214

47UF35V

50V

C222

STL8DN6LF3

50V

C20310UF

X5R

NP

R2031K

4

X5R

CMP_OUT_V

Net VIN

Net L200 D201 - Q203

Net D201 – C205

Net Q203R205

1

2

3

4

4

Figure 71. Details on SEPIC GND routing1. High current of GND of C200-C201-L200 & R206. This area is connected to bottom with a lot of via in the same zone

X7R

X5R 50V

47R

3

C201

22UF25V

4

4

C219100NFC0G

X5R

WURTH ELEKTRONIK

C216

10PF50V

100K

1/2W

C20210UF

VIN

R210

R200 10R

1

8

C0G

C0G

470R

L200

2*4.7µH

744871004

65

7

X5R

Q201

N-MOS

C205

100PF50V

R20210R

50V

2

R208

3.3K

3R204

2

CS_CMP

X5R

R205

1

R2060.033R

C200

22UF25V

50V

STL8DN6LF3

50V

C20310UF R2031K

1


UM2491 - Rev 3 page 61/81

Figure 72. Power GND routing details1. High current of GND from Coil : this GND Pow er must be connected between DCDC GND ( C206 to C214) – R Sense (R303& R508) and MOS (Q900-Q1000-Q1100)2. Place many vias near C214 between GND power and GND bottom side

X7R

+

VDCDC

C206

100NF50VX7R X5R

C207

5.6NF50V

C212

22UF35V

X5R

1

C211

22UF35V

C208

22UF35V

C213

22UF35V

TANTX5R

C209

22UF35V

C210

22UF35V

TP200

X5R

C214

47UF35V

X5RX5R

16

1M

X7R

2

Q500A

1

4

470K

R508

5

3

C500

470PF50V

One package

10K

R503

Q500B

0.022R

VRSENSE

1

GND POWER

1

TP301

TP300R302

6 7 8

4

C904100NF 1

25VX5R

COIL_1_SEL

2 3

5

N-MOS

GND POWER

6 7 8

4

C1004100NF 1

25VX5R

COIL_1_SEL

2 3

5

N-MOS

GND POWER

6 7 8

4

C1103100NF 1

25VX5R

COIL_1_SEL

2 3

5

N-MOS

GND POWER

2


UM2491 - Rev 3 page 62/81

Figure 73. Bridge node routing details1. VDCDC Sheet 642. GND sheet 673. VR sense must be very short Q301 R302 & R5094. Bridge node large nets5. Connection COIL bridge node TP11006. Connection COIL bridge node TP10007. Connection COIL bridge node TP9008. Bridge node place many vias

BRIDGE_NODE

2TP900

1

TP901

1

1


BRIDGE_NODE

2TP1000

1

TP1001

1

1


BRIDGE_NODE

2TP1100

1

TP1101

1

1


N-MOSSTL10N3LLH5

2 3

0.022R

VRSENSE

BRIDGE_NODE

1

VDCDC

GND POWER

Q301

Q3004

X5R

16 7 8

6 7 8

4

1

N-MOSSTL10N3LLH5

51 2 3

C3041NF50V

TP301

TP300

5

R302

470K

R5076

1MR505

X7R

X7R

2C50122NF50V

Q500A

R5041

4

100K

10R

470K

R506

470K

R508

ISENSE

5

VRSENSE3

X7R

C5044.7NF50VC500

470PF50V

One package

10K

R503

Q500BR509

1

2

3

4

5

6

7

8

4


UM2491 - Rev 3 page 63/81

8.2 EMI Components

Figure 74. EMI components1. R201 & C204: very close to D2002. C206 near top of VDCDC3. C207 near C214

X7R

D200

+

VDCDC

C206

100NF50VX7R

100K

X5R

C207

5.6NF50V

DEMAGNET

PMEG045V100EPD C212

22UF35V

X5R

C0G

1

C220100PF50V

C211

22UF35V

C208

22UF35V

C213

22UF35V

C204

TANTX5R

C209

22UF35V

R204 D201

R201

NP

4.3V

C210

22UF35V

TP200

X5R

C214

47UF35V

X5R

NP

R2031K

X5R

1

23

Ceramic capacitors (C100, C101, C102, C103, C104, C105) for EMI and filters must be placed close to the supplyinput and L100. The GND of these components must not be connected to a noisy GND.

UM2491EMI Components

UM2491 - Rev 3 page 64/81

Figure 75. EMI components – 2

X5R

C101

100NF50V

WIRE_SOLDER

VIN_USB_PD

C103

NP

C105

10UF25V

TP100

D100

C100

NP

1

1

C104

NP

X5RWIRE_SOLDER

1

2.2uH

3

C102

10UF25VJ101

L1002

X5R

PJ-002A132

ESDA25P35-1U1M

J100

TP101

UM2491EMI Components

UM2491 - Rev 3 page 65/81

8.3 STWBC-MC digital controller

Figure 76. STWBC-MC digital controller1. R400 near pin 28 and 292. C400 and L400 near pins 29 and 303. C401-L401-C402 near pins 13 and 14

31

X5R

DEMAGNET

C403

1UF16V

R400

RESET 28 SWIM27

C401100NF25V

1KL401

X5R

SWIM

X5R

NRST DNBL

SYMBOL_DETECT22

DEMAGNET 23

26DNBL_FB 3

X5R

C400100NF

25V

I2C_SDA 4

VOUT

29

VDD

A13

1KL400

STWBC-MCDigital Controller

VDD_STWBC

VDD

SYMBOL_DETECT

10K

C402100NF25V1

23

UM2491STWBC-MC digital controller

UM2491 - Rev 3 page 66/81

8.4 Current sense and demodulation

Figure 77. Current sensing1. C501 – R504 close to U400 net isense2. R507 near U400 net idemod must be protected (no noisy GND or signal)3. VRSENSE (Q301-R302 and R509 ) near current amplifier Q500 and R&C4. Warning: R 508 GND connected to GND on Rsense R302: Do not mix this track with ground plane.5. R508

C501 –

COIL_TEMP 19ISENSE

17QFOD_ADC 18

16VTARGET

15

VBUS

TANK_VOLTAGE

VDD_STWBC

VTARGETTANK_VOLTAGE

R413470K

QFOD_ADC

20VMAIN

ISENSE

470K

R5076

1MR505

IDEMOD

X7R

X7R

2C50122NF50V

Q500A

R5041

4

100K

10R

470K

R506

470K

R508

ISENSE

5

VRSENSE3

X7R

C5044.7NF50V

VDD_STWBC

C500

470PF50V

One package

10K

VDD_STWBC

R503

Q500BR509

1

2

34

5

UM2491Current sense and demodulation

UM2491 - Rev 3 page 67/81

Figure 78. Current demodulation1. Current demod (C509-R611-R612) closed to U400 pin 122. Current amplifier U600 near current sensing (Q500)

Layout note : GND reference of the OpAmp inputs have to be connected instar ground connection with the GNDplan of the power bridge.

X5R

C0G

2

22KX7R

330R

VDD_STWBC

1R610

1M

VDD_STWBC

3

C609

100NF50V

V+ 5

CURRENT_DEMOD

IDEMOD

C611

100NF50V

-IN3

+

- OUT

1

R611

2

R612

TP601

X5R

BAV99W

1

U600

D600

TSV521ICT

C607

2.2UF25V

C60822PF50V

C606

100NF25V

R613

V- 100K

X5R

X5R

+IN

4

C610220PF50V

1

2


UM2491 - Rev 3 page 68/81

Figure 79. Thermistor1. NTC R409 must be placed near current sensing (Q500)

1

COIL_TEMP 19

1K

ISENSE

17QFOD_ADC 18

180K16

VTARGET

15

VBUS

VDD_STWBC

TANK_VOLTAGE

CURRENT_DEMOD

VDD_STWBC

VTARGET

X7R

WAVE_SNS

R409

NTC

TANK_VOLTAGE

R407

C40410NF50V 47K

R413 470K

QFOD_ADC

20VMAIN

CURRENT_DEMOD

ISENSE


UM2491 - Rev 3 page 69/81

8.5 Driver bridge

Figure 80. Bridge driver routing1. Bridge driver U300 near MOS Q300 and Q3012. Nets UPBL and DNBL are very noisy: isolate these nets and add GND traces if sensitive nets are closed.

Direct GND lineconnection

N-MOSSTL10N3LLH5

2 3

LDRV

0.022R

7

PWMHI

5

VRSENSE

U300

R300 22R

PHASE

HIGHDRV HDRV

BRIDGE_NODE

D300NP

1

VCC

VDCDC

MCP14700

8

C303 100NF

25V

VDD_STWBC

GND POWER

22R

X7R

Q301

Q3004

LOWDRV

R303NP

X5R

BOOT

3

UPBL

16 7 8

6 7 8

4TH9

1

DNBL

PHASE

N-MOSSTL10N3LLH5

BOOT

5

C302

NP

1

1

R304

2 3

X7R

46

GND

2

PWMLO

C3011µF10V

C3041NF50V

TP301

TP300

5

R301 22R

R3021

2

UM2491Driver bridge

UM2491 - Rev 3 page 70/81

9 Mechanical assembly

9.1 Coil connectionStep 1. Connect each coil according to the following scheme:

– Coil top and bottom: same direction (CW)– Coil center: opposite direction (CCW)

Figure 81. Coil connectionWires connected to PCB top side

9.2 PCB mechanical assemblyUse this procedure to insert the plastic pieces between the bottom side nad the PCB.

Step 1. Insert x4 plastic 5 mm columns between the PCB and plexiglass.Step 2. Insert x4 M3x16 screws in the countersunk holes.Step 3. Insert x4 nut M3 on PCB side (on other side).

Figure 82. PCB assembly1. Plastic column 5mm2. Screw M3x163. Plexiglass 3mm

1 239.3 Coil mechanical assembly

Step 1. Place two 8 cm strips of adhesive tape on the bottom side of the coil plate.

UM2491

UM2491 - Rev 3 page 71/81

Figure 83. Coil assembly - adhesive tapeDouble coat acrylic foam adhesive tape12 mm wide x 0.6 mm thickness

Step 2. Center the coil plate on the plexiglass and press to ensure contact with the adhesive tape.

Note: Once the coil is attached, it is difficult to remove.

Figure 84. Coil assembly - on plexiglass

9.4 Top side assemblyPerform the following actions on the top plexiglass plate that covers the coils.

Step 1. Insert 4 M3x16 screws with countersunk head.Step 2. Insert 5 mm plastic spacers over the screws.

UM2491Top side assembly

UM2491 - Rev 3 page 72/81

Figure 85. Top plate assembly

9.5 Final mechanical assemblyStep 1. Fit the plexiglass plate with the transmitter board onto the cover plate with the scews and spacers.Step 2. fasten the 4x 20 mm standoffs onto the screws.

Figure 86. Final assembly1. 20 mm M3xM3 female/female standoffs

1

UM2491Final mechanical assembly

UM2491 - Rev 3 page 73/81

10 References

Datasheet DS12373: Digital controller for wireless battery chargers transmitters for Qi multicoil applications.Data brief DB3701: Qi 3-coil 15W wireless charger TX evaluation kit based on STWBC-MC.Data brief DB3702: Firmware for the STEVAL-ISB047V1 Qi 3-coil - FF wireless power transmitter evaluation kitbased on STWBC-MC.Data brief DB3418: Graphical user interface for wireless power transmitter evaluation boards based on theSTWBC chip family.Data brief DB3410: STWBC firmware downloader tool.

UM2491References

UM2491 - Rev 3 page 74/81


https://www.st.com/en/product/steval-isb047v1t

https://www.st.com/en/product/stsw-isb047fw


https://www.st.com/en/product/stsw-stwbcfwdt

Revision history

Table 7. Document revision history

Date Version Changes

13-Nov-2018 1 Initial release.

02-Jan-2019 2 Updated Section 6.1 Schematic diagrams.

06-Feb-2019 3

Updated Introduction, Section 2.1 STEVAL-ISB047V1T wireless transmitter board,Section 2.2 STWBC-MC pinout and pin description for 3-coil MP-A15 configuration,Section 7.1.1 STEVAL-ISB047V1T bill of materials, Section 6.1 Schematic diagrams andFigure 80. Bridge driver routing.

Minor text changes.

UM2491

UM2491 - Rev 3 page 75/81

Contents

1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2 STEVAL-ISB047V1 wireless charger kit overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.1 STEVAL-ISB047V1T wireless transmitter board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 STWBC-MC pinout and pin description for 3-coil MP-A15 configuration . . . . . . . . . . . . . . . . . 6

3 Firmware download and update procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3.1 STSW-STWBCGUI software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 Firmware download with the STSW-STWBCGUI software . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2.1 Firmware update procedure (chip already programmed). . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2.2 Download procedure with a new chip (never programmed). . . . . . . . . . . . . . . . . . . . . . . . 13

3.3 Erasing firmware procedure using STVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.4 Firmware download with command line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.4.1 Firmware download with written chip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.4.2 Firmware download with blank chip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.5 STVP file creation to download with STVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.6 Firmware download with STVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4 Setting up the evaluation equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4.1 How to supply power from an external source. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.2 How to supply power via USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3 How to set up a UART connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 GUI and evaluation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

5.1 Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.2 Test procedure for board calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.2.1 Presence detection calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.2.2 QFOD calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.3 Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.4 Standby consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

6.1 STEVAL-ISB047V1T schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.2 STEVAL-WBCDNGV1 schematic diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

UM2491Contents

UM2491 - Rev 3 page 76/81

7 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

7.1 STEVAL-ISB047V1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.1.1 STEVAL-ISB047V1T bill of materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.1.2 STEVAL-WBCDNGV1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8 Board assembly and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

8.1 Power signals (SEPIC, GND, LC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.2 EMI Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.3 STWBC-MC digital controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.4 Current sense and demodulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.5 Driver bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

9 Mechanical assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

9.1 Coil connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.2 PCB mechanical assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.3 Coil mechanical assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.4 Top side assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.5 Final mechanical assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

10 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

UM2491Contents

UM2491 - Rev 3 page 77/81

List of figuresFigure 1. Wireless charger kit top side with coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. Wireless charger kit bottom side with transmitter board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Figure 3. STEVAL-ISB047V1 block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 4. STEVAL-ISB047V1T transmitter board interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 5. STWBC-MC in 3-coil MP-A15 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Figure 6. STSW-STWBCGUI installation file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 7. Windows Device Manager: COM port selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Figure 8. STSW-STWBCGUI start screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 9. STEVAL-ISB047V1 evaluation kit connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 10. Firmware download with STSW-STWBCGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 11. DOS window: download in progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 12. Dongle connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 13. Firmware download with STSW-STWBCGUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 14. Power on message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 15. STEVAL-ISB047V1 evaluation kit connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 16. DOS window: download in progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 17. STVP configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 18. ST-LINK connection on the board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 19. STVP core selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 20. STVP download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 21. STVP wrong device selected alert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 22. STVP incompatibility device action query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 23. STSW-STWBCGUI command line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 24. STSW-STWBCGUI command line with blank chip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 25. STSW-STWBCGUI: convert CAB to STVP files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 26. Selecting the CAB file to be converted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 27. Selecting the STVP project file name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 28. STVP project files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 29. ST-LINK connection on the board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 30. STVP core selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 31. STVP open project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 32. STVP download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 33. STVP wrong device selected alert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 34. STVP incompatibility device action query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 35. Test setup configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 36. Power supply connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 37. Power supply connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 38. UART connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 39. STSW-STWBCGUI main window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Figure 40. STSW-STWBCGUI Qi protocol window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Figure 41. STSW-STWBCGUI: monitor window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 42. STSW-STWBCGUI parameter window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Figure 43. STSW-STWBCGUI: parameter modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Figure 44. STSW-STWBCGUI dump modified parameters to a bin file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Figure 45. STSW-STWBCGUI: CAB file patch button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Figure 46. Start auto calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 47. Presence detection test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figure 48. Test result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 49. QFOD test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 50. Test result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 51. Efficiency set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Figure 52. Efficiency performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

UM2491List of figures

UM2491 - Rev 3 page 78/81

Figure 53. STEVAL-ISB047V1T - circuit schematic (supply). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Figure 54. STEVAL-ISB047V1T - circuit schematic (sepic). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Figure 55. STEVAL-ISB047V1T - circuit schematic (bridge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Figure 56. STEVAL-ISB047V1T - circuit schematic (controller) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Figure 57. STEVAL-ISB047V1T - circuit schematic (sensing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Figure 58. STEVAL-ISB047V1T - circuit schematic (demod) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Figure 59. STEVAL-ISB047V1T - circuit schematic (mechanical parts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Figure 60. STEVAL-ISB047V1T - circuit schematic (USB-PD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Figure 61. STEVAL-ISB047V1T - circuit schematic (coil 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Figure 62. STEVAL-ISB047V1T - circuit schematic (coil2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Figure 63. STEVAL-ISB047V1T - circuit schematic (coil3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Figure 64. STEVAL-WBCDNGV1 circuit schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Figure 65. STEVAL-ISB047V1T evaluation board functional blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Figure 66. STEVAL-ISB047V1T power signal routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Figure 67. Ground plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Figure 68. Supply and Vin routing details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 69. Details on Power GND routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Figure 70. Details DCDC routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Figure 71. Details on SEPIC GND routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Figure 72. Power GND routing details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Figure 73. Bridge node routing details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63Figure 74. EMI components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64Figure 75. EMI components – 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Figure 76. STWBC-MC digital controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Figure 77. Current sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Figure 78. Current demodulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Figure 79. Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69Figure 80. Bridge driver routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Figure 81. Coil connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Figure 82. PCB assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Figure 83. Coil assembly - adhesive tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Figure 84. Coil assembly - on plexiglass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Figure 85. Top plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73Figure 86. Final assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

UM2491List of figures

UM2491 - Rev 3 page 79/81

List of tablesTable 1. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Table 2. Test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Table 3. Pinout description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Table 4. STEVAL-ISB047V1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Table 5. STEVAL-ISB047V1T bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Table 6. STEVAL-WBCDNGV1 bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

UM2491List of tables

UM2491 - Rev 3 page 80/81

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UM2491

UM2491 - Rev 3 page 81/81

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