Update: 30 September, 2023
This document presents the results of a 3-Phase auxiliary power supply designed with the UC3845 PWM driver and an ESBT, the new STC03DE170, as main switch. This work is supplemented by the release of a 45W dual output SMPS demo board, widely used as auxiliary power supply in 3-phase motor drive applications. Moreover, the ESBT base driving circuit and some guidelines for the optimization of the power dissipation are given. The influence of parasitic capacitance on ESBTs is also described in detail. Furthermore, the slope compensation has been added in order to remove the oscillation during max input voltage and min load. Accordingly, the discussion in theory is presented. Finally, the realization methods of the output short circuit's protection function are provided.
File format: PDF
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MD5 Checksum: 95DA3CB9E0AD7AFC8636097E55C79125
Publication date: 06 August, 2012
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PDF Link: ST AN2050 APPLICATION NOTE handbook PDF