Thermal controller for semiconductor switching power devices
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United States of America Patent
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May 19, 2015
Grant Date -
Aug 14, 2014
app pub date -
Jan 29, 2014
filing date -
Feb 12, 2013
priority date (Note) -
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Abstract
A thermal controller for driving a gate control unit of a gate-driven semiconductor switching device, the thermal controller comprising a junction temperature estimation module for generating an estimated junction temperature for the switching device, a gate voltage control module for modifying a gate voltage of the switching device, a switching frequency control module for modifying a switching frequency of the switching device, and a duty cycle control module for modifying the duty cycle of the switching device. In use, the thermal controller is adapted to activate one of the gate voltage control module, switching frequency control module and duty cycle control module dependent upon the estimated junction temperature in order to maintain the actual junction temperature below a pre-determined limit.
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