×

SINGLE CONVERSION POWER CONVERTER WITH HOLD-UP TIME

  • US 20040156217A1
  • Filed: 02/10/2003
  • Published: 08/12/2004
  • Est. Priority Date: 02/10/2003
  • Status: Active Grant
First Claim
Patent Images

1. A DC-DC converter having first and second input terminals to which an input DC voltage is coupled and two output terminals where the output DC power is provided, comprising:

  • a transformer comprising a primary winding, a secondary winding, and an auxiliary winding, each winding having a first and second end;

    said secondary winding coupled to said output terminals;

    a first switch connected in series with said primary winding across said first and second input terminals;

    said first switch alternately being switched on and off as a function of a control signal;

    a capacitor connected in series with a first diode and a second switch between said first and second input terminals; and

    a charging circuit for charging said capacitor to a predetermined value by said auxiliary winding;

    wherein said second switch is switched on when said input DC voltage is at or below a predetermined threshold such that said capacitor provides hold-up time for said converter.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×