Data Sheet
March 26, 2008
EQW006 Series, Eight Brick Power Modules: DC-DC Converter
36 – 75Vdc Input; 12Vdc Output; 6A Output Current
Test Configurations
TO OSCILLOSCOPE
L
TEST
Vin+
12μH
CURRENT PROBE
Design Considerations
Input Filtering
The power module should be connected to a low
ac-impedance source. Highly inductive source
impedance can affect the stability of the power
module. For the test configuration in Figure 7 a 33μF
electrolytic capacitor (ESR<0.7Ω at 100kHz),
mounted close to the power module helps ensure the
stability of the unit. Consult the factory for further
application guidelines.
BATTERY
C
S
220μF
33μF
E.S.R.<0.1Ω
@ 20°C 100kHz
Vin-
NOTE: Measure input reflected ripple current with a simulated
source inductance (L
TEST
) of 12μH. Capacitor C
S
offsets
possible battery impedance. Measure current as shown
above.
Figure 7. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
V
O
(+)
SCOPE
V
O
(–)
RESISTIVE
LOAD
0.01uF 0.1uF 10uF
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 8. Output Ripple and Noise Test Setup.
R
distribution
R
contact
Vin+
Vout+
R
contact
R
distribution
V
IN
V
O
R
LOAD
R
distribution
R
contact
Vin-
Vout-
R
contact
R
distribution
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 9. Output Voltage and Efficiency Test
Setup.
V
O
. I
O
Efficiency
η
=
V
IN
. I
IN
x
100 %
LINEAGE
POWER
7
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
