Data Sheet
EQW006 Series, Eight Brick Power Modules: DC-DC Converter
36 – 75Vdc Input; 12Vdc Output; 6A Output Current
March 26, 2008
Test Configurations
Design Considerations
Input Filtering
CURRENT PROBE
TO OSCILLOSCOPE
The power module should be connected to a low
ac-impedance source. Highly inductive source
impedance can affect the stability of the power
LTEST
Vin+
12μH
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.
CS 220μF
E.S.R.<0.1Ω
33μF
@ 20°C 100kHz
Vin-
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 12μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Figure 7. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
VO(+)
VO(–)
RESISTIVE
LOAD
SCOPE
0.01uF
10uF
0.1uF
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.
Rdistribution Rcontact
Rcontact Rdistribution
Vin+
Vout+
RLOAD
VO
VIN
Rdistribution Rcontact
Rcontact Rdistribution
Vin-
Vout-
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.
VO. IO
Efficiency
=
x
100 %
η
VIN. IIN
LINEAGE POWER
7
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
