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DC/DC converter

  • US 7,019,501 B2
  • Filed: 03/23/2004
  • Issued: 03/28/2006
  • Est. Priority Date: 08/08/2003
  • Status: Active Grant
First Claim
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1. A synchronous rectification type DC/DC converter comprising:

  • a main transistor;

    a synchronization transistor connected in series to the main transistor;

    a control circuit, connected to the main transistor and the synchronization transistor, for alternately activating the main transistor and the synchronization transistor for a predetermined activation time; and

    a capacitor, connected to the control circuit and charged when the synchronization transistor is activated, for supplying the control circuit with charge voltage used to activate the main transistor;

    the control circuit including a charging time setting circuit for setting the predetermined activation time of the main transistor and the synchronization transistor.

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