DC-DC converter having stable input voltage

Details DC-DC converter having stable input voltage DC-DC converter having stable input voltage

2005-12-13

2005-12-13

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S097000, C363S021030

Reexamination Certificate

active

06975520

ABSTRACT:
Provided is a DC-DC converter which is capable of obtaining a stable output irrespective of the fluctuation of the power source voltage and ensuring the reliability of a device. The DC-DC converter configured such that a current of a primary coil of a boosting transformer supplied from a power source unit is intermittently caused to flow through the converter by a power MOS-FET and an ignition capacitor is charged with electricity through a rectifier diode using the voltage of a secondary coil of the boosting transformer boosted by the flyback voltage of a coil, includes a current detecting circuit for detecting a drain current of the power MOS-FET, and a control circuit for, when the drain current detected by the current detecting circuit exceeds a predetermined threshold, turning off the power MOS-FET for a fixed period of time, and then turning on the power MOS-FET again.

REFERENCES:
patent: 6125046 (2000-09-01), Jang et al.
patent: 6304473 (2001-10-01), Telefus et al.
patent: 6344981 (2002-02-01), Norton et al.
patent: 6344986 (2002-02-01), Jain et al.
patent: 6529389 (2003-03-01), Perlick et al.
patent: 6665197 (2003-12-01), Gong et al.
patent: 6693810 (2004-02-01), Robinson et al.
patent: 03-036958 (1991-02-01), None
patent: 06-185440 (1994-07-01), None
patent: 2927128 (1999-05-01), None

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