Data Sheet
GE
EBDW020A0B Barracuda™ Series; DC-DC Converter Power Modules
36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output
Test Configurations
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance source. A highly inductive source impedance
can affect the stability of the power module. For the test
configuration in Figure 13, a 100μF electrolytic capacitor, Cin,
(ESR<0.7 at 100kHz), mounted close to the power module
helps ensure the stability of the unit. If the module is subjected
to rapid on/off cycles, a 330μF input capacitor is required.
Consult the factory for further application guidelines.
Safety Considerations
Note: Measure input reflected-ripple current with a simulated
source inductance (LTEST) of 12 µH. Capacitor CS offsets
For safety-agency approval of the system in which the power
module is used, the power module must be installed in
compliance with the spacing and separation requirements of
the end-use safety agency standard, i.e., UL60950-1 2nd Ed.,
CSA C22.2 No. 60950-1 2nd Ed., and VDE0805-1 EN60950-1 2nd
Ed.
possible battery impedance. Measure current as shown above.
Figure 13. Input Reflected Ripple Current Test Setup.
If the input source is non-SELV (ELV or a hazardous voltage
greater than 60 Vdc and less than or equal to 75Vdc), for the
module’s output to be considered as meeting the
requirements for safety extra-low voltage (SELV), all of the
following must be true:
.
The input source is to be provided with reinforced
insulation from any other hazardous voltages, including
the ac mains.
.
One VIN pin and one VOUT pin are to be grounded, or both
the input and output pins are to be kept floating.
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between
.
.
The input pins of the module are not operator accessible.
Another SELV reliability test is conducted on the whole
system (combination of supply source and subject
module), as required by the safety agencies, to verify that
under a single fault, hazardous voltages do not appear at
the module’s output.
51 mm and 76 mm (2 in. and 3 in.) from the module.
Figure 14. Output Ripple and Noise Test Setup.
Note: Do not ground either of the input pins of the module
without grounding one of the output pins. This may
allow a non-SELV voltage to appear between the
output pins and ground.
CONTACT AND
DISTRIBUTION LOSSES
VO1
VI(+)
IO
II
The power module has safety extra-low voltage (SELV) outputs
when all inputs are SELV.
LOAD
SUPPLY
The input to these units is to be provided with a maximum 15 A
fast-acting (or time-delay) fuse in the unearthed lead.
V
I
(–)
VO2
CONTACT
RESISTANCE
The power module has internally generated voltages
exceeding safety extra-low voltage. Consideration should be
taken to restrict operator accessibility.
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to avoid
measurement errors due to socket contact resistance.
Figure 15. Output Voltage and Efficiency Test Setup.
April 15, 2013
©2012 General Electric Company. All rights reserved.
Page 8
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
