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Active rectifier capable of preventing reverse leakage current

  • US 9,876,440 B1
  • Filed: 12/29/2016
  • Issued: 01/23/2018
  • Est. Priority Date: 09/29/2016
  • Status: Active Grant
First Claim
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1. An active rectifier, comprising:

  • a rectifier unit comprising;

    first and fourth transistors configured to become conductive in an interval in which voltage of an alternating current (AC) input is negative, and to apply current of the AC input to a rectifier capacitor; and

    second and third transistors configured to become conductive in an interval in which the voltage of the AC input is positive, and to apply the current of the AC input to the rectifier capacitor;

    a driver unit configured to output first to fourth drive control signals to gates of the first to fourth transistors; and

    a switching device control circuit unit configured to compare the first drive control signal applied to the gate of the first transistor and the second drive control signal applied to the gate of the second transistor with the AC input, and to output switching device control signals adapted to delay the first to fourth drive control signals based on extents to which the first and second drive control signals are delayed.

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