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Input current control method, switch control circuit and power supply including the switch control circuit

  • US 9,467,137 B2
  • Filed: 11/18/2014
  • Issued: 10/11/2016
  • Est. Priority Date: 11/18/2013
  • Status: Active Grant
First Claim
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1. An input current control method of a power supply including a power switch, comprising:

  • generating an input sense voltage by integrating a sense voltage that indicates a switch current flowing to the power switch for a switching period of the power switch;

    comparing the input sense voltage with a predetermined input reference voltage, wherein the input reference voltage is based on the switching period and a predetermined reference voltage; and

    controlling a switching operation of the power switch according to a result of the comparison.

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