DC converter

Details DC converter DC converter

2007-04-10

2007-04-10

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S097000

Reexamination Certificate

active

11320640

ABSTRACT:
A DC converter has a main switch connected in series to a primary winding of a transformer, and a series circuit of a capacitor and an auxiliary switch that is connected to both ends of the primary winding of the transformer or to both ends of the main switch, and also rectifies and smoothes a voltage of a secondary winding of the transformer to provide a DC output by alternate ON/OFF operations of the main switch and the auxiliary switch. This DC converter includes an error detector that detects an error by comparing the DC output to a reference voltage, a control circuit that controls ON/OFF of the main switch and the auxiliary switch based on the error detected by the error detector, and an activator that activates the control circuit by supplying, as power, an output of a joint of the auxiliary switch and a capacitor to the control circuit.

REFERENCES:
patent: 4535399 (1985-08-01), Szepesi
patent: 4772995 (1988-09-01), Gautherin et al.
patent: 5621625 (1997-04-01), Bang
patent: 6888728 (2005-05-01), Takagi et al.
patent: 7072192 (2006-07-01), Kakiuchi
patent: 5-176533 (1993-07-01), None
patent: 2000-92829 (2000-03-01), None
U.S. Appl. No. 11/320,640, filed Dec. 30, 2005, Aso et al.
U.S. Appl. No. 11/355,166, filed Feb. 16, 2006, Aso et al.
U.S. Appl. No. 11/357,161, filed Feb. 21, 2006, Aso et al.
U.S. Appl. No. 11/369,871, filed Mar. 8, 2006, Aso et al.

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