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CW025ACL-M Datasheet(PDF) 11 Page - General Semiconductor

Part # CW025ACL-M
Description  CW025 Triple-Output-Series Power Modules: 36 Vdc to 75 Vdc Input; 25W
Download  20 Pages
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Manufacturer  GE [General Semiconductor]
Direct Link  http://www.vishay.com
Logo GE - General Semiconductor

CW025ACL-M Datasheet(HTML) 11 Page - General Semiconductor

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Lineage Power
11
Data Sheet
April 2008
36 Vdc to 75 Vdc Input; 25 W
CW025 Triple-Output-Series Power Modules:
Test Configurations (continued)
8-810(C).c
Note: Use the specified ceramic capacitor. Scope measurement
should be made by using a BNC socket. Position the load
between 50 mm (2 in.) and 75 mm (3 in.) from the module.
Figure 19. Output Noise Measurement Test Setup
8-749(C).c
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 20. Triple Output Voltage and Efficiency
Measurement Test Setup
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source im-
pedances can affect the stability of the power module. A
33 µF electrolytic capacitor (ESR < 0.7
Ω at 100 kHz)
mounted close to the power module helps to ensure the
stability of the unit.
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.,
UL-1950, CSA 22.2-950, and EN60950.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), one of
the following must be true:
s
All inputs are SELV and floating, with the output also
floating.
s
All inputs are SELV and grounded, with the output
also grounded.
s
Any non-SELV input must be provided with reinforced
insulation from any other hazardous voltages, includ-
ing the ac mains, and must have a SELV reliability
test performed on it in combination with the convert-
ers. Inputs must meet SELV requirements.
If the input meets extra-low voltage (ELV) requirements,
then the converter’s output is considered ELV.
The input to these units is to be provided with a maxi-
mum 5 A normal-blow fuse in the ungrounded lead.
VO2 (+)
VO3 (–)
SCOPE
0.47 µF
COPPER STRIP
0.47 µF
RLOAD3
VO1 (–)
0.1 µF
SCOPE
RLOAD1
VO1 (+)
SCOPE
VO2, VO3,
COM
RLOAD2
VI(+)
I I
I O2
SUPPLY
CONTACT
RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD3
SENSE
VO2(+)
SENSE
VO3(–)
VO2(+)
VI(–)
VO1(+)
VO1(–)
LOAD2
LOAD1
I O1
SENSE
VO1(–)
SENSE
VO1(+)
VO2, VO3
COM
SENSE
VO2, VO3
COM
I O3
VO3(+)
η
VOj +
() VCOM
[]IOj
j1
=
3
VI +
()
VI
()
()
+
[]II
---------------------------------------------------------------
100
×
=


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