Switching power supply unit and electronic apparatus using...

Details Switching power supply unit and electronic apparatus using... Switching power supply unit and electronic apparatus using...

2005-05-24

2005-05-24

Laxton, Gary L. (Department: 2838)

Electric power conversion systems

Current conversion

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

Reexamination Certificate

active

06898090

ABSTRACT:
A switching power supply unit includes a transformer including a primary winding, a secondary winding, and a feedback winding; an input power supply and a first switching element that are connected in series with the primary winding; a control circuit provided between one end of the feedback winding and a control terminal of the first switching element; a rectification circuit connected to the secondary winding; and an output voltage detection circuit for detecting output voltage output from the rectification circuit and for sending a feedback signal to the control circuit. The control circuit includes an on-period control circuit for stabilizing the output voltage by turning off the first switching element in an on-state in accordance with the feedback signal. The control circuit also includes an off-period control circuit for stabilizing the output voltage by delaying turning on of the first switching element in accordance with the feedback signal.

REFERENCES:
patent: 4758937 (1988-07-01), Usui et al.
patent: 5012399 (1991-04-01), Takemura et al.
patent: 5995382 (1999-11-01), Miyazaki et al.
patent: 6208530 (2001-03-01), Hosotani
patent: 6529392 (2003-03-01), Nishida et al.
patent: 6577511 (2003-06-01), Yamaguchi et al.
patent: 1 020 980 (2000-07-01), None
patent: 0 938 184 (2001-08-01), None
patent: 1 150 417 (2001-10-01), None
patent: 2 168 865 (1986-06-01), None
patent: 07-067335 (1995-03-01), None

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