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VXR15-2812SM Datasheet(PDF) 10 Page - VPT, Inc.

Part No. VXR15-2812SM
Description  HIGH RELIABILITY COTS DC-DC CONVERTERS
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Maker  VPT [VPT, Inc.]
Homepage  https://www.vptpower.com/
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VXR15-2812SM Datasheet(HTML) 10 Page - VPT, Inc.

 
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VXR15-2800S SERIES DATASHEET
6.0
SALES INFORMATION: phone (425) 353-3010 • fax (425) 353-4030 • vptsales@vptpower.com • www.vptpower.com
10
6.3.3 Output Overcurrent Protection
The VXR15-2800S Series provides output overcurrent and output short circuit protection. During a load fault condition, a constant
output current control circuit reduces the converter duty cycle to limit the output current to approximately 130% of its rated value.
The converter will continue to provide constant current into any overload or short circuit condition. This feature allows the
converter to start into any capacitive load. Recovery is automatic and immediate upon removal of the fault condition. Sustain ed
short circuit or overload operation can cause excessive power dissipation. Care should be taken to control the operating
temperature of the converter in this condition.
6.4 PACKAGE
6.4.1 Package Description
The VXR15-2800S is constructed with an epoxy encapsulated V-SHIELD® package that includes integral metallization for enhanced
EMI shielding. The ruggedized package is highly resistant to chemical, solvent and salt environments and is fully compatible with
high volume manufacturing processes including wave solder, cleaning solvents, high pressure sprays and aqueous wash
processes. The encapsulated converter allows for superior shock and vibration performance in a low-weight package.
6.4.2 Thermal Performance
The VXR15-2800S Series is rated for full power operation at 105 °C. Operation above 105 °C is allowed at reduced power.
Specifically, the output power should be derated linearly from full power at 105 °C to half power at 110 °C and to zero power at
115 °C. The operating temperature of the converter is specified on the baseplate or top plate of the converter. The converter is
designed to be conduction-cooled, with either the baseplate or top plate mounted to a heat sink, chassis, PCB or other thermal
surface.
The DC-DC converter contains many semiconductor components. The maximum temperature rise from junction to case is 10 °C
at full load.


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