Active thermal control of a DC/DC GaN-based converter

Prasobhu, Pramod Kumar; Raveendran, Vivek; Buticchi, Giampaolo ORCID; Liserre, Marco ORCID

Advanced packaging technologies in Wide band gap devices like GaN avoid wire bonds thereby making the solder joints more susceptible to thermo-mechanical fatigue. To limit the thermal cycling induced failures, an active thermal control scheme using a two step gate driver for a buck converter is presented in this paper. In contrast to the active thermal control techniques employing variation of switching frequency, this method does not alter the converter operation point. A simple temperature control algorithm which actively varies the device losses is proposed. The effectiveness of the control scheme has been validated through experimental results.

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Prasobhu, Pramod Kumar / Raveendran, Vivek / Buticchi, Giampaolo / et al: Active thermal control of a DC/DC GaN-based converter. 2017.

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