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Systems and methods for output current regulation in power conversion systems

  • US 10,680,525 B2
  • Filed: 02/28/2019
  • Issued: 06/09/2020
  • Est. Priority Date: 05/15/2015
  • Status: Active Grant
First Claim
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1. A system controller for regulating a power converter, the system controller comprising:

  • a controller terminal configured to output a drive signal to a switch to affect a first current flowing through a primary winding of the power converter, the drive signal being associated with a switching period including an on-time period;

    wherein;

    the switch is closed in response to the drive signal during the on-time period; and

    a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period;

    wherein the system controller is configured to keep a multiplication product of the duty cycle and the duration of the on-time period approximately constant.

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