JHW050FG Datasheet, PDF (8/17 Pages) Lineage Power Corporation – JHW050 Dual Positive Output-Series Power Modules dc-dc Converter: 36 Vdc to 75 Vdc Input, Dual Positive Outputs 50W

JHW050 Dual Positive Output-Series Power Modules: dc-dc
Converter: 36 Vdc to 75 Vdc Input, Dual Positive Outputs; 50W
Data Sheet
April 2008
Test Configurations
TO OSCILLOSCOPE
LTEST
12μH
CURRENT PROBE
VI(+)
CS 220μF
E.S.R.<0.1Ω
@ 20°C 100kHz
33μF
VI(-)
Note: Measure input reflected ripple current with a simulated source inductance (LTEST) of
12 µH. Capacitor CS offsets possible battery impedance. measure current as shown
above.
Figure 12.Input Reflected Ripple Current Test
Setup
COPPER STRIPS
VO1(+)
VO1(–)
1µF
10µF
SCOPE
RLOAD1
VO2(+)
VO2(–)
1µF
10µF
SCOPE
RLOAD2
Note: Use a 1µF ceramic capacitor and a 10µF aluminium or tantalum capacitor. The
scope measurement should be made using a BNC socket. Position the load 50mm
to 75mm (2” to 3”) from the moudle.
Figure 13.Output Ripple and Noise Test Setup
CONTACT AND
DISTRIBUTION LOSSES
VI(+)
VI
VO1(+)
VO1
CONTACT AND
DISTRIBUTION LOSSES
RLOAD1
VO1(–)
VO2(+)
VI(–)
VO2
VO2(–)
RLOAD2
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 14.Output Voltage and Efficiency Test Setup
Efficiency
η = ^V-----O---¹---I--^O---¹--V--⁺--_I-I--V_I----^O----²---I--^O---²-
Design Considerations
Input Source Impedance
The power module should be connected to a low ac-
impedance source. A highly inductive sourceimped-
ance can affect the stability of the power module. For
the test configuration in Figure 12, 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.
Safety Considerations
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, CSA C22.2 No. 60950-00, and EN
60950 (VDE 0805): 2001-12.
If the input source in non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75 Vdc), for the modules’s output to be considered as
meeting the requirements for safety extra-low voltage
(SELV), all of the following must be true:
n the input source is to be provided with reinforced
insulation from any hazardous voltages, including the
ac mains.
n One VI pin and one VO pin are to be grounded, or
both the input and output pins are to be kept floating.
n The input pins of the module are not operator acces-
sible.
n Another SELV reliability test is conducted on the
whole system, as reauired by the safety agencies, on
the combination of supply source and subject mod-
ule to verify that under a single fault, hazardous volt-
ages do not appear at the module’s output.
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.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
For input voltages exceeding –60 Vdc but less than or
equal to –75 Vdc, these converters have been evalu-
ated to the applicable requirements of BASIC INSULA-
TION between secondary DC MAINS DISTRIBUTION
input (classified as TNV-2 in Europe) and unearthed
SELV outputs. (–B option only)
The input to these units is to be provided with a maxi-
mum 5A normal-blow fuse in the ungrounded lead.
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