Power control circuit for controlling rated power supplied...

Details Power control circuit for controlling rated power supplied... Power control circuit for controlling rated power supplied...

2007-07-17

2007-07-17

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S247000, C315S225000, C315S244000, C315SDIG002

Reexamination Certificate

active

11429940

ABSTRACT:
A power control circuit includes a power switch unit operable so as to enable and disable supply of an input voltage from an external power source to an LC circuit, a voltage detecting unit for generating a first voltage signal in accordance with an output voltage applied to a load and outputted by the LC circuit, and a current detecting unit for generating a second voltage signal in accordance with a current flowing through the power switch unit. A driver receives a pulse width modulation signal from a comparator in accordance with a comparison result between a summation of the first and second voltage signals and a reference voltage, and outputs a driving signal to a control input unit of the power switch unit so as to control a duty cycle of the power switch unit, thereby controlling rated power supplied to the load to correspond to the reference voltage.

REFERENCES:
patent: 5140229 (1992-08-01), Yagi et al.
patent: 5384518 (1995-01-01), Kido et al.
patent: 5449973 (1995-09-01), Yamashita et al.
patent: 6958581 (2005-10-01), Okawa et al.

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