Switching power supply unit

Details Switching power supply unit Switching power supply unit

2007-01-02

2007-01-02

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S097000

Reexamination Certificate

active

11272891

ABSTRACT:
A first side circuit connected to a primary coil of a transformer includes a main switching element driving the primary coil, and a control circuit which detects an output voltage to feedback and drives and controls the main switching element so as to keep constant the output voltage by acquiring a voltage induced in a tertiary coil of the transformer. A secondary side circuit of the transformer includes a dummy load circuit connected to the output terminal, a detection circuit which detects a secondary coil voltage of the transformer, and a dummy load control circuit which is controlled by the detection circuit and controls so as to flow current flow through the dummy load circuit only in a state of a light load.

REFERENCES:
patent: 5420777 (1995-05-01), Muto
patent: 5903452 (1999-05-01), Yang
patent: 6134123 (2000-10-01), Yamada
patent: 6631082 (2003-10-01), Birumachi
patent: 6768655 (2004-07-01), Yang et al.
patent: 7006365 (2006-02-01), Kitano
patent: 5-236743 (1993-09-01), None
patent: 5-80185 (1993-10-01), None

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