TDK-Lambda Corporation
i3A Evaluation Board Manual
TDK Lambda Evaluation Board P/N
i3A5A8A-001-EVK-D2PP
TDK-Lambda Corporation
Table of Contents
- 2 -
Getting Started with the i3A
Before Using the Eval Board……………………………………………………...3
Device Introduction…….…………………………………………….……….……4
Evaluation Board Introduction ……………………………………………………5
Converter #1 Test Points and Controls ………………………………………….6
Converter #2 Test Points and Controls…………………………………………..7
Input Section test Points…………………………………………………………..8
Input/Output Electrical Connections & Vo Adjust ………………………………9
Operation ……………………………………………………………………..…...10
Setup Example ………………………………………………………………..….11
Setup Example Using Scope ………………………….....………………….…..12
Appendices
Scope Measurement Technique...………………………………………………13
Simplified Evaluation Board Schematic………..………………………….…...15
Evaluation Board Silkscreen…………………...……………………………….16
Evaluation Board Bill of Materials…………......………………………………..17
TDK-Lambda Corporation
Before Using the Eval Board
• Follow the electrical connection instructions for the
evaluation board carefully. Reverse Connections on the
input or the output can cause permanent damage.
• Do not operate the input voltage higher than the specified
values. Overvoltage on the input to the device will cause
permanent damage.
• This product contains a printed circuit board utilizing surface
mounted devices. PCB stresses such as bending, twisting
etc. can cause damage. Please handle with care.
- 3 -
Caution
TDK-Lambda Corporation
Getting Started with the i3A
I3A Series DC/DC Power Modules
9-53V Input, 4.5 & 8A Output
100W 1/32nd Brick Power Module
I3A power modules perform local voltage conversion
from a 12V, 24V, or well regulated 48V bus. The i3A
series utilizes a low component count that results in
both a low cost structure and a high level of
performance. The open-frame, compact, design
features a low profile and weight that allow for extremely
flexible and robust manufacturing processes. The ultrahigh
efficiency allows for a high amount of usable power
even in demanding thermal environments.
Device Introduction
- 3 -
TDK-Lambda Corporation
Eval Board Introduction
Eval Board is populated with two i3A Converters
Converter Section #1:
I3A4W008A033V
Vi: 9 – 53 VDC
Vo: 3.3 – 16.5 Volts
8 A Max
100 W Max
Converter Section #2:
I3A4W005A150V
Vi: 9 – 53 VDC
Vo: 5 – 30 Volts
4.5 A Max
100 W Max
Input Voltage Output Voltage V out 1
Adj.
V out 2
Adj.
- 5 -
TDK-Lambda Corporation
Converter #1 Test Points and Controls
TP3
Vo Sense
TP2
Trim TP1
Enable
TP15
V out+
TP3
V out -
Converter On/Off
Control
- 6 -
TDK-Lambda Corporation
Converter #2 Test Points and Controls
TP10
Vo Sense
TP9
Trim TP8
Enable
TP17
V out+
TP18
V out -
Converter On/Off
Control
On Off
- 7 -
TDK-Lambda Corporation
Input Section test Points
- 8 -
TP20
Vin -
TP19
Vin +
Vi: 9 – 53 VDC
Do not exceed input voltage range
TDK-Lambda Corporation
Input/Output Electrical Connections & Vo Adjust
9 – 53 Volt
Input Connections Output Connections
Converter #1
Output
Converter #2
Output
V2 Output
Adjust
V1 Output
Adjust
- 9 -
Do not exceed max
input voltage
TDK-Lambda Corporation
Operation
•Once input voltage is applied, either of the converters can be turned on or off using ON/OFF toggle switch.
•User can change output voltage by using Vo1 or Vo2 Trim adjust potentiometer:
•V01 Adjustment Range: 3.3 – 16.5 Volts •Vo2 Adjustment Range: 5 – 30 Volts
•Please note the specified operating ranges and keep in mind that the positive output units are step down converters. The input voltage to the converters must always be greater than the output voltage. Please see charts below:
- 10 -
Maximum attainable
output voltage for any
given input voltage
Minimum attainable
output voltage for
any given input
voltage
i3A4W008A033V i3A4W005A150V
TDK-Lambda Corporation
Setup Example
48 VDC In Vo 2: 30
VDC Out Vo 1: 16.5
VDC Out
Converters can be turned on or off using toggle switches.
- 11 -
TDK-Lambda Corporation
Setup Example Using Scope
• An oscilloscope can be connected to the inputs and the
outputs to observe converter behavior.
• Top trace shows input voltage rise to 48 VDC.
• Bottom Trace shows converter startup characteristic into
full load.
- 12 -
TDK-Lambda Corporation
Appendix
Scope Measurement Technique When making sensitive measurements a vertical mini-probe socket should be used to connect
the oscilloscope probe to minimize loop area of the measurement leads. See scope connection
below using Agilent P/N N2768A.
- 13 -
Vertical Mini Probe
Socket P/N N2768A
TDK-Lambda Corporation
Appendix
- 14 -
Scope Measurement Technique (cont.)
. Example below shows output ripple measurement on the left with a vertical mount socket
connection to the board. The right shows loop pickup.
Full load output ripple with scope socket Full load output ripple with ground loop.
Note Noise Pickup
TDK-Lambda Corporation
Appendix (cont.)
- 15 -
Simplified Evaluation Board Schematic
TP151
TP161
TP171
TP19
1
TP20 1
EN2
R226
0
1 2
CCW
R835
50K1
2
3
CCW
R834 50K
1
2
3
R769
1 2
R770
1 2
GND(-)
Trim PS1
C8151000pF
12
C8171000pF
12
C818
1000pF
1 2
C8201000pF
12
C816
12
VIN+
On/Off
Vin-
SENSE+
TRIM
VOUT+
PG
VOUT-
SEQ
SYNC
M/S
PS1N/A
1
2
3
4
5
7
6
8
32
33
34
VIN+
On/Off
Vin-
SENSE+
TRIM
VOUT+
PG
VOUT-
SEQ
SYNC
M/S
PS2N/A
1
2
3
4
5
7
6
8
32
33
34
R821
0
12
R822
0
12
CCW R823
50K1
2
3
CCW
R82050K
1
2
3
VIN+
On/Off
Vin-
SENSE+
TRIM
VOUT+
PG
VOUT-
SEQ
SYNC
M/S
PS3N/A
1
2
3
4
5
7
6
8
32
33
34
Vout1_Trim
Vout1+
VIN+
On/Off
Vin-
SENSE+
TRIM
VOUT+
PG
VOUT-
SEQ
SYNC
M/S
PS4N/A
1
2
3
4
5
7
6
8
32
33
34
Vout1-
VIN+
On/Off
Vin-
SENSE+
TRIM
VOUT+
PG
VOUT-
SEQ
SYNC
M/S
PS5N/A
1
2
3
4
5
7
6
8
32
33
34
VIN+
On/Off
Vin-
SENSE+
TRIM
VOUT+
PG
VOUT-
SEQ
SYNC
M/S
PS6N/A
1
2
3
4
5
7
6
8
32
33
34
L755
270nH
1 2
Vin(+)
C310uF
12
C210uF
12
+
C810220uF
12
BB25
1 2BB261 2
BB27
1 2BB281 2
Vout2--
R126 1 2R125 1 2
BB91 2
BB12
1 2
BB13
1 2BB141 2
BB29
12
BB30
12
F10456-020-ER
1 2
F2
0456-020-ER
12
+
C813
220uF
12
R225
0
1 2R391 2
R41
0
1 2
C76410uF
12
C76510uF
12
C1410uF
12
C1510uF
12
+
C22220uF
12Power Good PS1
Enable PS1
Sense PS1
C410uF
12
C510uF
12
+
C814220uF
12
Vout2+
TP11
TP21
TP31
TP71
TP81
TP101
TP91
TP141
Enable PS2
Trim PS2
Sense PS2
Power Good PS2
BB7
N/A
1 2BB8
N/A
1 2
SPDT
SW1
12
3
SPDT
SW2
12
3
R818
0
12
R819
0
12
TDK-Lambda Corporation
Appendix (cont.)
- 16 -
Evaluation Board Silkscreen
TDK-Lambda Corporation
Appendix (cont.)
- 17 -
Mfr. Name Mfr. Part Number Description Ref Des
TDK C3225X7S1H106MT CERAMIC CAPACITOR, 50V, 1210, 10uF, X7S C5
TDK C3225X7S1H106MT CERAMIC CAPACITOR, 50V, 1210, 10uF, X7S C3
TDK C3225X7S1H106MT CERAMIC CAPACITOR, 50V, 1210, 10uF, X7S C14
TDK C3225X7S1H106MT CERAMIC CAPACITOR, 50V, 1210, 10uF, X7S C764
PANASONIC EEEFK1J101P CAP, 100UF, 63V, SMT C810
PANASONIC EEEFK1J101P CAP, 100UF, 63V, SMT C813
TDK C2012X7S2A105K125AB CERAMIC CAPACITOR, 100V, 0805, 1.0uF C820
TDK C2012X7S2A105K125AB CERAMIC CAPACITOR, 100V, 0805, 1.0uF C815
TDK C2012X7S2A105K125AB CERAMIC CAPACITOR, 100V, 0805, 1.0uF C817
TDK C2012X7S2A105K125AB CERAMIC CAPACITOR, 100V, 0805, 1.0uF C816
TDK C2012X7S2A105K125AB CERAMIC CAPACITOR, 100V, 0805, 1.0uF C818
TDK C2012X7S2A105K125AB CERAMIC CAPACITOR, 100V, 0805, 1.0uF C819
PULSE PA2607.271NL 270nH 30A L755
LITTLEFUSE 0456020.ER 20A SMT Fuse F1
LITTLEFUSE 0456020.ER 20A SMT Fuse F2
Power Unit Assembly I3A4W008A033V-001-R DCDC Power Module PS5
Power Unit Assembly I3A4W005A150V-001-R DCDC Power Module PS6
Evaluation Board Bill Of Materials