User Guide
Digital DC-DC
Evaluation Board
MDC-AN-63 08 July 2014
Digital DC-DC Evaluation Board
User Guide
Introduction
Users can easily connect the input source and loads to evaluate and configure Murata Power Solution Digital DC-DC quarter-brick or eighth-brick modules for
the system’s electrical performance that takes after their target application (figure 1). Together with the GUI software, the evaluation board, and USB to PMBus
interface makes it possible to access each module from a PC. During initialization, the software scans the PMBus to read which modules are present and list them
in its top panel, together with their addresses and major set-up parameters. The evaluation board monitors up to two devices.
Figure 1. Typical Setup
Equipment Required

Digital power evaluation board (see figure 1).

0 - 130 volts, DC @ 0-20 Ampere power supply, the input source should be sized for the maximum power required by the converter(s).

2 or 4 channel, 100MHz oscilloscope (monitor Vin, Vout) optional.

4 ½ digit multimeters (monitor Vin, Vout, Iout) optional.

Electronic load or resistive load; the load should be sized for the maximum power produced by the converter(s)

Current shunt (100A, 100mV) for output current test, current shunt (20A, 50mV) for input current test Optional .

MPS-AD001 USB Interface Adapter

MPS Power Brick GUI 1.0 software.

Digital DC-DC quarter-brick or eighth-brick modules
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Digital DC-DC Evaluation Board
User Guide
Board Description and Key Connections
Connects to MPS
I2C Interface
Adapter
UUT1 On/Off
Enable Control
Vout+
Vin+
DC
Source
Output
DC Load
Vout–
Vin–
Figure 2. Key Connections
UUT2 On/Off
Enable Control
Setting Up a Digital Power Evaluation Board

Connect a wire from the negative (-) terminal of input source to Vin- of the evaluation board.

Connect a wire from the negative (+) terminal of input source to Vin+ of the evaluation board.

Connect a wire from the negative (-) terminal of electronic load (or the other terminal of a resistive load) to Vout- of the evaluation board.

Connect a wire from the negative (+) terminal of electronic load (or the other terminal of a resistive load) to Vout+ of the evaluation board.

Connect the I2C USB adapter to the evaluation board as shown in figure 1.
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Digital DC-DC Evaluation Board
User Guide
Other Board Features
1: Primary On/Off Control (see figure 3)
J2
This switch can disable/Enable the UUT1 and UUT2
(J1 and J3 are closed).
This switch can disable/Enable the UUT1 (J2 is closed).
This switch can disable/Enable the UUT2 (J2 is closed).
J1
J3
UUT1 J1
UUT2 J3
Fuse
J2
Figure 3. J1, J2, J3 Switches
2: Secondary On/Off Control (see figure 4)
S1-1
S1-2
S1-3
S1-4
This switch can disable/Enable the UUT1 and UUT2 per Secondary On/Off control
pin (S1-2 or S1-3 is closed).
This switch can disable/Enable the UUT2 (S1-1, J1, J2 and J3 is opened).
This switch can disable/Enable the UUT1 (S1-1, J1, J2 and J3 is opened).
None
Figure 4. S1 Switch
Power-Up Instructions for Digital DC-DC Quarter-Brick or Eighth-Brick Modules
1.
Mount the model(s) into evaluation board and then check the Vin source and load are connect well.
2.
For negative logic models, make sure enable switches are in the On position and for positive logic models, make sure enable switches are the Off position.
Note: In parallel model (2 units are mounted on the evaluation board), please make sure the J1, J3 are closed and the J2 is opened and also the Secondary On/Off
control switch are need to turned Off before turn on the input source.
3.
Turn on the input source (36-75V supply).
4.
Turn enable switch J1 or J3 (J2 is closed) for device you wish to monitor or configure.
Note: In parallel model (2 units are mounted on the evaluation board), turn on the J2 (J1 and J3 are closed) to enable the UUT and UUT2.
5.
Connect the USB Interface Adapter to evaluation board.
6.
Start MPS Power Brick GUI Software.
Power-Down Instructions Digital DC-DC Quarter-Brick or Eighth-Brick Modules
1.
2.
3.
Turn off the input source.
Stop the MPS Power Brick GUI Software.
Remove the unit(s) from the evaluation board.
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08 July 2014 MDC-AN-63 Page 4 of 6
Digital DC-DC Evaluation Board
User Guide
Positioning of the Address Resistors
The table below displays the recommended resistor values to assign to the module address. See DBQ or DBE series data sheet for more details.
If the calculated PMBus address is 0d, 11d, or 12d, SA0 or SA1 is left open; default PMBus address of 120d is assigned instead.
The SA0 and SA1 value VS resistor connected to GND.
(SA0, SA1 index)
0
1
2
3
4
5
6
7
Resistor Value [kΩ]
10
22
33
47
68
100
150
220
Figure 5. Position of Address Resistors for Modules
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08 July 2014 MDC-AN-63 Page 5 of 6
green
VIN+
R11
20K
1%
0603
1
TESTPOINT TP12
1
TESTPOINT TP11
F5_1
S_3.3V_AUX
R5
10K
1%
0603
RED
1
B
E2
C3
CTRL/CS_2
CTRL/CS_1
F5_2
F5_1
VOUT+
TEST POINT
PRI_EN2
R6
1
TESTPOINT TP10
PRI_EN1
1K
1%
0603
1
TESTPOINT TP9
VIN+
MMBT3904
Q1
D2
F5_2
S_3.3V_AUX
R7
10K
1%
0603
1
TP7 TESTPOINT
1
TP6 TESTPOINT
1
TP5 TESTPOINT
1
TP4 TESTPOINT
1
TP3 TESTPOINT
1
TP2 TESTPOINT
1
TP1 TESTPOINT
C3
DATA
CLOCK
ALERT
CAPACITOR
RED
1
B
CAPACITOR
220uF/100V
E2
C3
PRI_EN2
MMBT3904
Q2
ALERT
VOUT+
10K
1%
0603
R12
BNC
BNC2
BNC
BNC1
1
B
E2
C3
BNC
5
4
3
2
1
5
4
3
2
1
GREEN
VIN+
LED
S_3.3V_AUX
1
TP15 TESTPOINT
1
TP14 TESTPOINT
1
TP13 TESTPOINT
J1-1
J2-1
J4-1
J1-2
VIN+
C4
J2-2
PRI_EN1
D3
220uF/100V
R8
1
TESTPOINT TP8
D1
R13
1K
1%
0603
ISO 9001 and 14001 REGISTERED
MMBT3904
Q4
D5
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
1K
1%
0603
J4-2
VOUT+
9
7
5
3
1
1
2
F1
FUSE2
20A
FUSE3
1
47K
R1
100K
1%
0603
R3
0603
2
2
1
2
1
2
1
2
1
47K
R2
100K
1%
0603
R4
0603
VIN+
VOUT+
CTRL/CS_1
F5_1
CTRL/CS_2
ALERT
DATA
F5_2
CLOCK
VOUT+
PRI_EN2
PRI_EN1
2
0
2
0
2
0
0
1
2
J2
0
1
2
J1
0
1
2
J3
1
1
1
J7
J6
J9
J8
CTRL/CS_2
INPUT/OUTPUT SOCKETS
J4
10
8
6
4
2
J5-1
J6-1
J5
J3-1
J3-2
J6-2
J5-2
VOUT+
DATA
1
2
3
4
J38
J37
J36
J35
J34
1UF
1210
C2
J43
J42
J41
J40
J39
8
7
6
5
S_3.3V_AUX
CLOCK
SWITCH
CTRL/CS_1
PMBUS SOCKET
C1
7343
10UF
SW-DIP4
S1
ALERT
+
Digital DC-DC Evaluation Board
User Guide
Figure 6. Evaluation Board Schematic
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2014 Murata Power Solutions, Inc.
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