Switching power supply having dual current feedback

Details Switching power supply having dual current feedback Switching power supply having dual current feedback

2007-11-13

2007-11-13

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S021170, C363S097000

Reexamination Certificate

active

11375884

ABSTRACT:
An arrangement for use in a switching power supply includes a power supply output line, a current sensing circuit, and a feedback circuit. The output line is operably coupled to an output winding of a transformer. The transformer has a first winding operably connected to a switching device configured to be switched in accordance with a first control signal. The current sensing circuit is operable to generate a current signal that is representative of current on the output line. The feedback circuit is operable to generate a feedback signal as a function of the current on the output line. The feedback signal has a first relationship with respect to the current when the current is below a threshold, and has a second relationship with respect to the current when the current is above the threshold.

REFERENCES:
patent: 6134122 (2000-10-01), Chen et al.
patent: 6577512 (2003-06-01), Tripathi et al.

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