Power source apparatus

Details Power source apparatus Power source apparatus

2006-12-26

2006-12-26

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S049000, C363S021160

Reexamination Certificate

active

07154762

ABSTRACT:
An input voltage is applied by an NMOS transistor (34) driven by an oscillation circuit (60) to a primary winding (32a) of a transformer (32) intermittently. A voltage induced in a secondary winding (32b) is rectified and smoothed by an output circuit (91) to be an output voltage. In a normal mode where no standby signal is supplied, the oscillation circuit (60) controls the NMOS transistor (34) so that the output voltage is stabilized at a predetermined first value. When a standby signal is supplied, a detection circuit (100) detects the standby signal and transmits the detection to a starting circuit (40). The starting circuit (40) starts the oscillation circuit (60) when a voltage of a capacitor (33) reaches an upper limit, and stops the oscillation circuit (60) when this voltage lowers below a lower limit. This upper limit is lower than an upper limit at which the starting circuit (40) starts the oscillation circuit (60) in the normal mode.

REFERENCES:
patent: 5179508 (1993-01-01), Lange et al.
patent: 5689407 (1997-11-01), Marinus et al.
patent: 6252783 (2001-06-01), Huh et al.
patent: 6538419 (2003-03-01), Allen et al.
patent: 6587357 (2003-07-01), Halamik et al.
patent: 0993105 (2000-04-01), None
patent: 2000-270546 (2000-09-01), None
patent: 2001-327165 (2001-11-01), None
patent: 2001-333579 (2001-11-01), None

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