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METHOD AND APPARATUS FOR A CONTROL CIRCUIT WITH MULTIPLE OPERATING MODES

  • US 20120320634A1
  • Filed: 08/27/2012
  • Published: 12/20/2012
  • Est. Priority Date: 10/04/2006
  • Status: Active Grant
First Claim
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1. A controller for use in a power converter, the controller comprising:

  • an oscillator to be coupled to a switch of the power converter to determine a switching cycle period of the switch; and

    means for controlling a duty cycle of the switch to regulate an output of the power converter and for maintaining a substantially constant rate of change of the duty cycle with respect to changes in a magnitude of a feedback signal as the controller transitions between a first duty cycle control mode and a second duty cycle control mode such that a control loop gain of the power converter is substantially constant during the transition.

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