Controller with loop impedance modulation for power converter

Details Controller with loop impedance modulation for power converter Controller with loop impedance modulation for power converter

2007-01-23

2010-12-21

Behm, Harry (Department: 2838)

Electric power conversion systems

Current conversion

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

C323S297000, C363S049000

Reexamination Certificate

active

07855899

ABSTRACT:
A control circuit is provided to generate a mode signal at light load of the power converter. The mode signal is coupled to disable the switching signal for saving power. The impedance of an input circuit is increased in response to the mode signal. Furthermore, a soft start circuit is initiated by the mode signal when switching signal is enabled. An external capacitor associates with the impedance of the input circuit determine the off period of the switching signal.

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patent: 2005/0248965 (2005-11-01), Yamada et al.
patent: 2005/0281062 (2005-12-01), Choi et al.

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