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GENERATING DRIVE SIGNALS FOR A SYNCHRONOUS RECTIFICATION SWITCH OF A FLYBACK CONVERTER

  • US 20090207637A1
  • Filed: 05/25/2007
  • Published: 08/20/2009
  • Est. Priority Date: 05/29/2006
  • Status: Active Grant
First Claim
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1. A circuit arrangement (100) comprising at least one flyback converter, in particular at least one actively clamped bidirectional flyback converter, witha first power semiconductor (Q1),a second power semiconductor (Q2),a third power semiconductor (Q3),a fourth power semiconductor (Q4),wherein the first power semiconductor (Q1) and the third power semiconductor (Q3) are arranged on the primary side of a transformer unit (Tr1), and the second power semiconductor (Q2) and the fourth power semiconductor (Q4) are arranged on the secondary side of the transformer unit (Tr1),characterized in that the second power semiconductor (Q2) acts as synchronous rectification switch, andthe drive signal for said synchronous rectification switch is generated as a function of an oscillating signal controlling the synchronous rectification switch.

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