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METHOD AND APPARATUS PROVIDING PROTECTION FOR POWER CONVERTER

  • US 20080025054A1
  • Filed: 07/31/2006
  • Published: 01/31/2008
  • Est. Priority Date: 07/31/2006
  • Status: Active Grant
First Claim
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1. A switching control circuit for a power converter, comprising:

  • an input circuit coupled to receive a threshold signal at an input terminal;

    a first comparator coupled to receive a signal representative of the current of a power switch, the first comparator to generate a control signal in response to the signal and the threshold signal;

    a second comparator coupled to receive the signal to limit the current of the power switch;

    a timer circuit coupled to generate a timing signal at a timer terminal in response to the control signal, the timer circuit to generate a time-out signal in response to the timing signal;

    wherein the time-out signal is used to turn off the power switch.

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