EVAL-1000020

EVAL-1000020
Evaluation Board for Demi Brick
Converter and Filter Modules
Advancing the
Power Curve
Summary
®
SynQor has developed EVAL-1000020, an evaluation board
to facilitate testing of our Demi brick DC-DC converters and
filter modules.
Introduction
This application note is a guide to the features, schematic, component placement, and BOM for this evaluation
board. The applicable series of modules include the Demi brick single and dual converters and Demi brick filters.
For assistance with testing the performance of our DC-DC power converters, please refer to our application note
“Guidelines for Testing SynQor DC-DC Converters”.
Contents
Section 1 – Input and Output Connections
Section 2 – Switches, Trim Resistors, and BNC Connectors
Section 3 – Schematic
Section 4 – Component Placement
Section 5 – Bill of Materials (BOM)
Shock Warning: There are areas of this evaluation board that have exposed access to high voltage. Exercise
caution to avoid contact with those voltages. Also note that the evaluation board may retain high voltage
temporarily after input power has been removed. Exercise caution when handling
Application of Input Power: Never apply input power to a converter with a switch closure, such as a knife switch
or circuit breaker. That type of action applies input voltage with an uncontrolled very high rate of rise (dV/dt) that
could be damaging to the converter and to external components before the converter. Instead, apply input voltage
with a controlled rate of rise. Also, ensure input voltage is off before inserting or removing a converter module from
the evaluation board
Thermal Considerations: When testing converters on an evaluation board, ensure adequate cooling. Apply
cooling air with a fan blowing across the converter or across a heatsink attached to the converter. Monitor the
converter temperature to ensure it doesn’t exceed the maximum rated per the datasheet specification
Sockets: This evaluation board uses sockets to provide the option of testing multiple converters. These sockets
are not rated for continuous high currents. Short-term testing is fine, but be aware of this limitation for longerterm testing. The spring fingers in the sockets will add resistance in the power path, which will cause voltage
drops at higher currents that could contribute significant errors in regulation and efficiency measurements. These
spring fingers also do not provide the thermal cooling path from the module pins to PCB routing that is enabled by
soldered connections. This may contribute to higher converter temperatures and error when performing thermal
evaluations. For longer-term testing, thermal testing, and permanent installations use soldered connections.
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Advancing the Power Curve Advancing the
Power Curve
®
Application Note
EVAL-1000020
Section 1 – Input and Output Connections
Input power is applied through connector J1 as VIN+ and VIN-.
Output power is applied through connector J2 as VOUT+ and VOUT RTRN.
Control signals are available through connectors J1 and J2.
See Tables 1 and 2 below for input power, output power, and control signals.
Table 1: Input Signals (connector J1)
Terminal # of Connector
Signal Name
1
VIN-
2
VIN-
3
VIN-
4
SYNC-IN
5
SINC-OUT
6
ON/OFF
7
No Connection (N/C)
8
VIN+
9
VIN+
10
VIN+
11
No Connection (N/C)
Table 2: Output Signals (connector J2)
Terminal # of Connector
Signal Name
1
VOUT+
2
VOUT+
3
No Connection (N/C)
4
TRIM
5
SENSE-
6
SENSE+
7
VOUT-
8
VOUT-
9
No Connection (N/C)
10
VOUT RTRN
11
VOUT RTRN
Note: Please refer to the appropriate SynQor converter datasheet for descriptions of these features.
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Advancing the Power Curve Advancing the
Power Curve
®
Application Note
EVAL-1000020
Section 2 – Switches, Trim Resistors, and BNC Connectors
Description of Switches
ON/OFF Switch
ON/OFF switch SW1 provides manual on and off enable control of the converter. Toggling this switch to the
“ON” position enables the converter. Toggling this switch to the “OFF” position disables the converter.
Trim Switch
Toggling switch SW2 to the “UP” or “DOWN” position connects the converter trim pin to the OUTPUT_RTN or
OUTPUT+ pin through the trim resistors. This allows for trimming the output voltage up or down. Leaving the
switch in the middle position will disable the output voltage trim function.
Description of Trim Resistors
Voltage Trim
Fixed resistor R2 or R21 and potentiometer R4 are connected to OUTPUT_RTN and are used to adjust up the
output voltage set-point of the converter.
Fixed resistor R3 or R31 and potentiometer R5 are connected to OUTPUT+ and are used to adjust down the
output voltage set-point of the converter.
BNC Monitoring Point Descriptions
VIN-FILTER
Filter module positive input voltage, referenced to filter module input return
VIN-CONVERTER
Converter module positive input voltage, referenced to converter module input return
SYNC-IN
SYNC_IN synchronization input signal, referenced to converter module input return
SYNC-OUT
SYNC_OUT synchronization output signal, referenced to converter module input return
VOUT+
Converter module positive output voltage, referenced to converter module output return
VOUTConverter module negative output voltage, referenced to converter module output return
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Advancing the Power Curve Advancing the
Power Curve
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FLTR1-L
FLTR1-K
FLTR1-J
FLTR1-I
FLTR1-H
FLTR1-G
FLTR1-F
FLTR1-E
FLTR1-D
FLTR1-C
FLTR1-B
FLTR1-A
J12
J11
J10
J9
J8
J7
J6
J5
J4
J3
J2
J1
ON/OFF
VOUT-
CON_MOLEX_11P_300V_TB
J1
11
10
9
8
7
6
5
4
3
2
1
VOUT+
VOUT-
VIN-
VIN+
SW1
ON/OFF
C5
OPEN
6
7
8
1 9
2
VOUT-
10A
F1
2
3
4
5
VIN+
6
7
8
1 9
VOUT-
VIN+
OUTPUT_RTN
C4
OPEN
VIN-
ON/OFF
SYNC_OUT
SYNC_IN
OPEN
C9
VOUT-
D21
49.9
2
3
4
5
49.9
BNC2
2
R12
1
R11
1
VIN+
VIN-CONVERTER
VOUT+
OUTPUT_RTN
VOUT+
PS2-L
PS2-K
PS2-J
PS2-I
PS2-H
PS2-G
PS2-F
PS2-E
PS2-D
PS2-C
PS2-B
PS2-A
PS1-J
PS1-K
PS1-L
PS1-I
PS1-H
PS1-F
PS1-G
PS1-E
PS1-D
PS1-C
PS1-B
J1
J12
J11
J10
J9
J8
J7
J6
J5
J4
J3
J2
J1
J12
J11
J10
TRIM
SNSSNS+
OUTPUT-
OUTPUT+
TP2-1
TP3-1
TP1-1
TP_RTN-1
OUTPUT+
OUTPUT-
OUTPUT+
OUTPUT_RTN
OUTPUT-
C7
OUTPUT_RTN
1.0uF
C3
2
3
4
5
VOUT-
6
7
8
1 9
BNC6
C8
R31
Open
2
1
2
2
2 1
2
2
R5
R4
3
CW
3
CW
2
TRIM
SW2
JP6 1
VOUT-
VOUT+
C16
OPEN
Input Cap
OPEN
C14
C15
10uF
1
1
1
JP1 2
JP3 2
JP5 2
JP6 for high output voltage Trim
C17
OPEN
C13
OPEN
Output Cap
Blue Jumper Connectors
TRIM
OUTPUT-
OUTPUT_RTN
OUTPUT+
OPEN
C12
JP2 and JP3 for single output Trim/Sense
Connections
TRIM DOWN
1
R3
Open
R2
R21
1
1
1
TRIM UP/TRIM SENSE
J2
CON_MOLEX_11P_300V_TB
1
2
3
4
5
6
7
8
9
10
11
OUTPUT+ OUTPUT-
1.0uF
C2
OUTPUT_RTN
6
7
8
1 9
OUTPUT+
C6
Test Points
TRIM
OUTPUT-
OUTPUT_RTN
OUTPUT+
SYNC_IN
SYNC_OUT
2
3
4
5
BNC5
VOUT+
OUTPUT_RTN
SNS+
JP4 2
SNS-
1
ON/OFF
VOUT-
VOUT+
TRIM
OUTPUT_RTN
J8
JP2 2
OUTPUT+
J7
6
7
8
1 9
1
SYNC_IN
J6
J9
SYNC_OUT
J5
VOUT-
VOUT+
ON/OFF
VOUT-
2
3
4
5
BNC4
SYNC-OUT
J4
J3
J2
6
7
8
1 9
PS1-A
2
3
4
5
BNC3
SYNC-IN
SYNC_IN
BNC1
SYNC_OUT
VIN-
3 2
Rev. A
1
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OUTPUT+
QMS#065-0000048
OUTPUT_RTN
VOUT+
2
R6
1
2
R9
1
2
R7
2
R8
1
|
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VIN-FILTER
Application Note
EVAL-1000020
Section 3 – Schematic
Advancing the Power Curve -
Advancing the
Power Curve
®
Application Note
EVAL-1000020
Section 4 – Component Placement
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QMS#065-0000048
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Rev. A
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02/06/15
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Advancing the Power Curve Advancing the
Power Curve
®
Application Note
EVAL-1000020
Section 5 – Bill of Materials (BOM)
Table 3: EVAL-1000020
Ref Des
Value
Tolerance
Package
C2
1 uF
10 %
1206
Description
Capacitor, X7R, 50 V
C3
1 uF
10 %
1206
Capacitor, X7R, 50 V
C4
OPEN
10 %
1812
Capacitor, X7R, 2000 V
C5
OPEN
10 %
1210
Capacitor, X7R, 100 V
C6
4.7 uF
10 %
1206
Capacitor, X7R, 50 V
C7
4.7 uF
10 %
1206
Capacitor, X7R, 50 V
C8
4.7 uF
10 %
1206
Capacitor, X7R, 50 V
10 %
1210
Capacitor, X7R, 100 V
20 %
1210
Capacitor, X7R, 25 V
C9
OPEN
C12
OPEN
C13
OPEN
C14
OPEN
C15
10 uF
20 %
1210
Capacitor, X7R, 25 V
C16
OPEN
20 %
1210
Capacitor, X7R, 25 V
C17
OPEN
D21
OPEN
SMC
Diode, TVS, bidirectional, 1.5SMC130CA
F1
10 A
2410
Fuse, R451 010. MR
R2
OPEN
Through-hole
Resistor
R3
OPEN
Through-hole
Resistor
R4
20K
10 %
R5
20K
10 %
R6
OPEN
Axial
Zero Ohm jumper
R7
OPEN
Axial
Zero Ohm jumper
R8
0
5%
1206
Resistor
R9
0
5%
1206
Resistor
Capacitor, aluminum electrolytic
Resistor, Trim Potentiometer, 3299Y-1-203 LF
Resistor, Trim Potentiometer, 3299Y-1-203 LF
R11
49.9
1%
0805
Resistor
R12
49.9
1%
0805
Resistor
R21
OPEN
5%
1206
Resistor
R31
OPEN
5%
1206
Resistor
Page 6
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QMS#065-0000048
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Rev. A
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02/06/15
|
Advancing the Power Curve Advancing the
Power Curve
®