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PWM regulator with discontinuous mode and method therefor

  • US 7,298,124 B2
  • Filed: 12/01/2004
  • Issued: 11/20/2007
  • Est. Priority Date: 12/01/2004
  • Status: Active Grant
First Claim
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1. A method of forming a power supply controller comprising:

  • configuring the power supply controller to form a PWM drive signal operable to control a power switch to form a current through an inductor of a power supply system;

    configuring the power supply controller to receive a current sense signal that is representative of current flow through the inductor; and

    configuring the power supply controller to reduce an operating frequency of the power supply controller responsively to the power supply controller detecting a zero crossing of the current through the inductor and responsively to operating in a discontinuous conduction mode wherein the operating frequency is greater than zero.

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