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DC-DC Converters in High Temperature Environments Slide 6
The power rating of conventional converters goes down dramatically at a certain point as temperature rises.  This phenomenon is called derating. The derating point usually starts between 40 degrees Celsius and 70 degrees Celsius. Beyond the derating point a conventional converter will be stressed and will start losing power gradually. ICE technology allows full power without derating up to 95 or 100 degrees Celsius. The bottom picture shows a comparison between a conventional converter (the RP60 series) and a converter with ICE technology (the RPP30 series from RECOM). The operating temperature is pushed up to 100 degrees Celsius without derating in natural convection.  Additionally, the case temperature can achieve up to 120 degrees Celsius. An accurate thermal sensor is built-in to prevent overheating and a soft start is guaranteed to facilitate safe starting at minus 45 degrees Celsius or below.
PTM Published on: 2011-11-03