Switching power supply

Details Switching power supply Switching power supply

2005-12-27

2005-12-27

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021160, C363S097000

Reexamination Certificate

active

06980444

ABSTRACT:
It is an object to control the peak of drain current and control overload in a same switching device in a switching power supply which has a load of a transformer and so on, and to prevent a complicated circuit and an increase in the number of terminals of a control circuit. Overload protection is performed as follows: according to a change in a feedback current which is an input to a feedback signal control circuit, the peak value of the current of a switching element, a switching operation is performed intermittently to reduce power consumption when the feedback current decreases at a light load, and an increase in the voltage of an FB terminal is detected and the switching operation is stopped in an overload state where overload protection is performed on the switching element.

REFERENCES:
patent: 6023178 (2000-02-01), Shioya et al.
patent: 6101106 (2000-08-01), Shi
patent: 6154377 (2000-11-01), Balakrishnan et al.
patent: 6381151 (2002-04-01), Jang
patent: 6914789 (2005-07-01), Kinoshita et al.
patent: 5-30735 (1993-02-01), None

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