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SWITCH-MODE DRIVE SENSING OF REVERSE RECOVERY IN BIPOLAR JUNCTION TRANSISTOR (BJT)-BASED POWER CONVERTERS

  • US 20160255685A1
  • Filed: 02/27/2015
  • Published: 09/01/2016
  • Est. Priority Date: 02/27/2015
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • driving a base current from a base current source to a base of a bipolar junction transistor (BJT) to maintain conduction of the bipolar junction transistor (BJT) during a first time period;

    disconnecting the base current source from the bipolar junction transistor (BJT) for a second time period, wherein the second time period comprises a reverse recovery time period during which the bipolar junction transistor (BJT) remains conducting while the base current source is disconnected; and

    detecting an end of the reverse recovery time period by monitoring a voltage at the base of the bipolar junction transistor (BJT).

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