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Secondary side constant voltage and constant current controller

  • US 20090016086A1
  • Filed: 07/09/2007
  • Published: 01/15/2009
  • Est. Priority Date: 07/09/2007
  • Status: Active Grant
First Claim
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1. An integrated circuit comprising:

  • a first terminal;

    a second terminal;

    a third terminal;

    a fourth terminal;

    a first amplifier circuit that senses an overvoltage condition on the first terminal and in response causes a first current to flow through the fourth terminal; and

    a second amplifier circuit that senses a voltage difference between a voltage on the second terminal and a voltage on the third terminal and causes a second current to flow through the fourth terminal if the voltage difference is above a predetermined voltage, wherein the first and second amplifier circuits are powered by a supply current received onto the integrated circuit through the first terminal.

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