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Systems and methods for regulating output currents of power conversion systems

  • US 10,170,999 B2
  • Filed: 01/06/2017
  • Issued: 01/01/2019
  • Est. Priority Date: 04/18/2014
  • Status: Active Grant
First Claim
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1. A system controller for a power converter, the system controller comprising:

  • a modulation signal generator configured to receive a first compensation signal and a ramping signal and generate a modulation signal based at least in part on the first compensation signal and the ramping signal, the first compensation signal being associated with a converted signal and a second compensation signal, the converted signal being associated with an input signal for a power converter, the second compensation signal being associated with a sensing signal related to a first current flowing through a primary winding of the power converter; and

    a drive signal generator configured to receive the modulation signal and output a drive signal to affect the first current, the drive signal being associated with an on-time period, a switch being closed during the on-time period;

    wherein the system controller is configured to adjust a duration of the on-time period based at least in part on the converted signal and the first compensation signal.

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