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Reducing voltage transients across a MOSFET in a synchronous rectifier in a DC/DC converter
Reducing voltage transients across a MOSFET in a synchronous rectifier in a DC/DC converter
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机译:减少DC / DC转换器中同步整流器中MOSFET两端的电压瞬变
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摘要
A MOSFET is used as a synchronous rectifier in a fly-back DC/DC converter and connected in series with a secondary winding of a transformer. The MOSFET is repetitively turned on and off in response to the turning off and on of a primary switch connected in series with a primary winding of the transformer. Circuit elements on the secondary winding side detect voltage transients across the MOSFET caused by reverse currents when it is turned off and shorten at least a next on-period of the MOSFET in response to the detection of such transients.
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