
Data Sheet
September 2001
FW250H1 and FW300H1 Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 24 Vdc Output; 250 W to 300 W
The FW250H1 and FW300H1 Power Modules use advanced,
surface-mount technology and deliver high-quality, compact,
dc-dc conversion at an economical price.
Applications
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Redundant and distributed power architectures
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Computer Equipment
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Communications equipment
Options
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Heat sink available for extended operation
Features
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Size: 61.0 mm x 116.8 mm x 13.5 mm
(2.40 in. x 4.60 in. x 0.53 in.)
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Wide input voltage range
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High efficiency: 89% typical
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Parallel operation with load sharing
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Output voltage set-point adjustment (trim)
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Thermal protection
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Synchronization
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Power good signal
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Current monitor
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Output overvoltage and overcurrent protection
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Constant frequency
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Case ground pin
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Input-to-output isolation
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Remote sense
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Remote on/off
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ISO* 9001 Certified manufacturing facilities
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UL 60950 Recognized, CSA C22.2 No. 60950-00
Certified, and
VDE§ 0805 (EN60950) Licensed
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CE mark meets 73/23/EEC and 93/68/EEC
directives**
Description
The FW250H1 and FW300H1 Power Modules are dc-dc converters that operate over an input voltage range of
36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the inputs,
allowing versatile polarity configurations and grounding connections. The modules have maximum power rat-
ings from 250 W to 300 W at a typical full-load efficiency of 89%.
Two or more modules may be paralleled with forced load sharing for redundant or enhanced power applications.
The package, which mounts on a printed-circuit board, accommodates a heat sink for high-temperature
applications.
*
ISO is a registered trademark of the International Organization for Standardization.
UL is a registered trademark of Underwriters Laboratories, Inc.
CSA is a registered trademark of Canadian Standards Assn.
§
VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** This product is intended for integration into end-use equipment. all the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on
selected products.)