Please download the dossier by clicking on the dossier button x
×

Vrms and rectified current sense full-bridge synchronous-rectification integrated with PFC

  • US 7,269,038 B2
  • Filed: 09/12/2005
  • Issued: 09/11/2007
  • Est. Priority Date: 09/12/2005
  • Status: Active Grant
First Claim
Patent Images

1. A synchronous full bridge rectification circuit having an AC input and a DC output, the circuit comprising:

  • a boost inductor with a first node coupled to the AC signal;

    a full bridge rectifier circuit functionally connected between a second node of the boost inductor and the DC output, the full wave rectifier circuit comprising at least two controllable switches;

    means for sensing current in the DC output and in the charging paths of the boost inductor on both half cycles of the AC input; and

    a controller arranged to receive the AC signal, the sensed currents, and the DC output, wherein the controller outputs signals to control the at least two controllable switches in a manner where the PF of the synchronous full bridge rectifier approaches unity with respect to the AC source, wherein the controller output signal are separate and independent signals, one such signal to each of the at least two controllable switches, wherein in one half cycle of the AC signal, one controllable switch is driven on and the other is intermittently driven on and off, and wherein during the other half cycle of the AC signal the other controllable switch is driven on and the one controllable switch is intermittently driven on and off.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×