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Reference Design
iW1706-00 for 12V 600mA Network Adapter Design
EBC10011
Table of Contents
www.iwatt.comRev. 1.1 EBC10011 Page 2 aPR, 2012
1.0. Introduction ....................................................................................................................................................................3
2.0. Design Features ............................................................................................................................................................3
3.0. Power Supply Design Specification ...............................................................................................................................4
4.0. Schematic ......................................................................................................................................................................5
5.0. PCB Layout ....................................................................................................................................................................5
6.0. Bill Of Materials ..............................................................................................................................................................6
7.0. Transformer drawing ......................................................................................................................................................7
8.0. Performance ..................................................................................................................................................................8
8.1. Regulation, Ripple and Efficiency Measurement ......................................................................................................8
8.2. CV and CC Regulation ........................................................................................................................................8
8.3. Conducted EMI .................................................................................................................................................8
iW1706-00 For Network Adapter Design(AC Input 90–264VAC, Output 12V 600mA)EBC10011
12V 600mA Network Adapter with iW1706-00 EBC10011
www.iwatt.com
Rev. 1.1 EBC10011 Page 3 aPR, 2012
1.0 Introduction
AC input range 90-264VAC
DC output 12V 600mA
Meet “150mW” no-load standby power consumption requirement
Meet “EPA 2.0” requirement at end of output DC-Cable
Max ripple < 150mVP_P
No Y-Cap design
2.0 Design Features
AC Input DC Output
EE1614
N L
33mm
iW1706-00-(No Cable -Drop -Compensation)
50mm
This document provides a reference design for a universal input, 12V 600mA isolated flyback network adapter. For this design the iW1706-00 is used. It contains the complete specification of the power supply, a detailed circuit diagram, the entire bill of materials required to build the power supply, drawing of the power transformer, and test data of the most important performance.
Figure 1.1 PCB Top View
Figure 1.2 PCB Bottom View
12V 600mA Network Adapter with iW1706-00 EBC10011
www.iwatt.com
Rev. 1.1 EBC10011 Page 4 aPR, 2012
3.0 Power Supply Design Specification
Description Symbol Min Typ Max Units Comment
Input
Voltage VIN 90 264 VAC
Frequency fLINE 47 50/60 63 Hz
No-load Input Power (230VAC) 150 mW
Output
Output voltage VOUT 11.4 12.0 12.6 V Measured at the end of DC-Cable
Output current IOUT 0 0.6 A
Output ripple voltage VRIPPLE 150 mVP_P
Measured at end of output DC-CableIOUT=0.6A @TA = 25 °C20 MHz bandwidth
Total Output Power
Continuous output power POUT 7.2 W
Over-current protection IOUT_MAX 0.9 A Auto-restart
Active mode protection η 74.6 % Measured at the end of DC-Cable, VIN=115VAC and 230VAC (TAMB = 25 °C)
Environmental
Conducted EMI Meets CISPR22B / EN55022B
Safety Designed to meet IEC950, UL1950 Class II
Ambient temperature TAMB 0 40 °C
The table below represents the minimum acceptable performance of the design.
12V 600mA Network Adapter with iW1706-00 EBC10011
www.iwatt.com
Rev. 1.1 EBC10011 Page 5 aPR, 2012
AC Input V +
V -
+
U1iW1706 - 00
L1
L2
C16.8 μF
C26.8 μF
F1
L
N
10Ω
D7SR260
T1EE16
10 kΩ
R31 MΩ
R41 MΩ
2.2 ΩR10
24 kΩR8
3.6 ΩR7
FR102D6
4.49 kΩR9 C5C4
C7470 µF
16 V
+
+
+
V1
2
5
43
CC OUTPUT
ISENSEVSENSE
GND
C647pF 0.1μF
MJE13003Q1
D1
D3
D2
D4
1N4007
1N4007
1N4007
1N4007
470 μH
4.7 kΩR2
5.6 μH R6300 Ω
C3 R5220 kΩ
D5FR107
1 nF1 kV
R11
10μF
4.0 Schematic
5.0 PCB Layout
Figure 4.1 Design Schematic
Figure 5.1 PCB Layout 50 mm x 33 mm
PCB Top PCB Bottom
12V 600mA Network Adapter with iW1706-00 EBC10011
www.iwatt.com
Rev. 1.1 EBC10011 Page 6 aPR, 2012
6.0 Bill of Materials
Item Qty. Ref. Description Manufacturer P/N Manufacturer
1 1 IC1 iW1706-00, off-line digital PSR & VMS PWM controller, SOT23-5 iW1706-00 iWatt, Inc
2 2 C1,C2 6.8μF, 400V, E-CAP, (Φ10mm×12mm) KLH-400V6R8MG125 KOSHIN3 1 C3 1nF, 1KV, ceramic capacitor CK45-R3AD102K-NR TDK Corporation4 1 C4 10μF, 50V, low ESR E-CAP, (Ф5mmX11.5mm) KLH-050V100MC100 KOSHIN5 1 C5 0.1μF, 25V, X7R, SMD-0603 C1608X7R1E104K TDK Corporation6 1 C6 47pF, 25V, X7R, SMD-0603 06033A470KAT4A AVX Corporation7 1 C7 470μF, 16V, low ESR E-CAP, (Ф8mmX12mm) EKMG160ELL471MHB5D United Chemi-Con8 1 R2 4.7KΩ, ±5%, SMD-0805 ERJ-6GEYJ472V Panasonic - ECG9 2 R3,R4 1MΩ, ±5%, SMD-1206 ERJ-8GEYJ105V Panasonic - ECG
10 1 R5 220KΩ, ±5%, SMD-1206 ERJ-8GEYJ224V Panasonic - ECG11 1 R6 300Ω, ±5%, SMD-0805 ERJ-6GEYJ301V Panasonic - ECG12 1 R7 3.6Ω, ±1%, SMD-0805 CRCW08053R60FKEA Vishay Dale13 1 R8 24KΩ, ±1%, SMD-0805 CRCW080524K0FKEA Vishay Dale14 1 R9 4.49KΩ, ±1%, SMD-080515 1 R10 2.2Ω, ±1%, SMD-1206 ERJ-8RQF2R2V Panasonic - ECG16 1 R11 10KΩ, ±5%, SMD-0805 ERJ-6GEYJ103V Panasonic - ECG17 4 D1,D2,D3,D4 1A, 1000V, rectifier diode, DO-41 1N4007 Taiwan Semiconductor 18 1 D5 1A, 1000V, fast recovery rectifier, DO-41 FR107 Taiwan Semiconductor 19 1 D6 1A, 100V, fast recovery rectifier, DO-41 FR102 Taiwan Semiconductor20 1 D7 2A, 60V, Schottky diode, DO-15 SR260 Won-Top Electronics21 1 F1 10Ω, fusible resistor, 1W FRM1WJT-52-10R Yageo22 1 L1 5.6μH, color ring inductor, 0510 8230-38-RC JW Miller A Bourns23 1 L2 470μH, color ring inductor, 0510 8230-84-RC JW Miller A Bourns24 1 Q1 1.5A, 800V,NPN transistor, TO-126 HMJE13003 HSMC CORP25 1 T1 EE1614, transformer, horizontal type
12V 600mA Network Adapter with iW1706-00 EBC10011
www.iwatt.com
Rev. 1.1 EBC10011 Page 7 aPR, 2012
Schematic:
Electrical Specifications:1. Primary inductance (Lp) = 1.55mH ± (7%) @10KHz2. Primary leakage inductance (Lk) < 5% * Lp 3. Electrical strength = 3KV, 50/60Hz, 1Min.
Materials:1. Core: EE1614 (ferrite material TDK PC40 or equivalent)2. Bobbin: EE16 horizontal3. Magnet wires (pri): type 2-UEW4. Magnet wire (sec): triple insulated wires 5. Layer insulation tape : 3M1298 or equivalent
Finished:1. Varnish the complete assembly
7.0 Transformer drawing
10
6
12Ts
15Ts
5
2
3
Bias
Secondary 128TsPrimary
1
Note:• Dot () denotes electrical
start.
• Electrical start could be different from mechanical or winding start.
12V 600mA Network Adapter with iW1706-00 EBC10011
www.iwatt.com
Rev. 1.1 EBC10011 Page 8 aPR, 2012
8.0 Performance
8.1 Regulation, Ripple and Efficiency Measurement
* Note: Output voltage is measured at end of PCB
Vin(VAC)
Pin(W)
Vout(V)
Iout(mA)
VRIPPLE
(mVP-P)Pout(W)
η(%)
OCP(mA)
Average η(%)
90
0.062 11.90 0 10
701 77.71 2.286 11.99 150 46 1.80 78.67 4.560 11.98 300 76 3.59 78.82 6.980 12.01 450 68 5.40 77.43 9.506 12.03 600 110 7.22 75.93
115
0.070 11.91 0 8
700 79.75 2.272 11.98 150 46 1.80 79.09 4.469 11.98 300 62 3.59 80.42 6.740 12.01 450 66 5.40 80.19 9.100 12.03 600 82 7.22 79.32
230
0.120 11.90 0 8
713 78.88 2.381 11.98 150 56 1.80 75.47 4.557 11.99 300 58 3.60 78.93 6.726 11.99 450 68 5.40 80.22 8.921 12.03 600 76 7.22 80.91
264
0.167 11.90 0 10
706 77.78 2.433 11.98 150 42 1.80 73.86 4.631 11.99 300 64 3.60 77.67 6.803 11.99 450 74 5.40 79.31 8.993 12.03 600 72 7.22 80.26
8.2 CV and CC Regulation 8.3 Conducted EMI
Vin=230VAC/50Hz, Live
Vin=230VAC/50Hz, Neutral
Frequency(MHz)
Frequency(MHz)
Ampl
itude
(dBμ
V)Am
plitu
de(d
BμV)
V OUT
(V)
IOUT (mA)
V OUT
(V)
IOUT (mA)
0 100 200 300 400 500 600 700 800
18.0
12.0
9.0
6.0
3.0
0.0
15.0
0 100 200 300 400 500 600 700 800
18.0
12.0
9.0
6.0
3.0
0.0
15.0
VI Curve (Vin=90VAC/50Hz)
VI Curve (Vin=264VAC/50Hz)
www.iwatt.com
Rev. 1.1 EBC10011 Page 9 aPR, 2012
Trademark Information
© 2012 iWatt, Inc. All rights reserved. iWatt, BroadLED, EZ-EMI, Flickerless, Intelligent AC-DC and LED Power, and PrimAccurate are trademarks of iWatt, Inc. All other trademarks and registered trademarks are the property of their respective owners.
Contact Information
Web: http://www.iwatt.comE-mail: [email protected]: +1 (408) 374-4200Fax: +1 (408) 341-0455
iWatt Inc.
675 Campbell Technology Parkway, Suite 150Campbell, CA 95008
DisclaimeriWatt reserves the right to make changes to its products and to discontinue products without notice. The applications information, schematic diagrams, and other reference information included herein is provided as a design aid only and are therefore provided as-is. iWatt makes no warranties with respect to this information and disclaims any implied warranties of merchantability or non-infringement of third-party intellectual property rights.
iWatt cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an iWatt product. No circuit patent licenses are implied.
Certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (“Critical Applications”).
IWATT SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS, OR OTHER CRITICAL APPLICATIONS.
Inclusion of iWatt products in critical applications is understood to be fully at the risk of the customer. Questions concerning potential risk applications should be directed to iWatt, Inc.
iWatt semiconductors are typically used in power supplies in which high voltages are present during operation. High-voltage safety precautions should be observed in design and operation to minimize the chance of injury.