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Systems and methods for constant voltage control and constant current control

  • US 10,003,271 B2
  • Filed: 08/11/2015
  • Issued: 06/19/2018
  • Est. Priority Date: 03/31/2012
  • Status: Active Grant
First Claim
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1. A system controller chip for regulating a power conversion system, the system controller chip comprising:

  • a first controller pin;

    a second controller pin; and

    a third controller pin;

    wherein the system controller chip is configured to;

    receive an input signal at the first controller pin and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system;

    receive a first signal at the second controller pin from the switch; and

    charge a capacitor through the third controller pin in response to the first signal.

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