Electronic device and power supply unit thereof

Details Electronic device and power supply unit thereof Electronic device and power supply unit thereof

2008-05-21

2011-12-06

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

Having plural converters for single conversion

C363S049000, C323S228000, C323S238000, C323S266000, C323S271000

Reexamination Certificate

active

08072784

ABSTRACT:
An exemplary electronic device includes a controller, a first convertor, a second convertor, and a switching unit. The first convertor is configured for receiving a first voltage from an external power supply and converting the first voltage into a second voltage. The controller is coupled to the first convertor for generating a start signal when receiving the second voltage. The second convertor is connected to the controller for receiving the first voltage, converting the first voltage into a third voltage to power an operating unit of the electronic device, and converting the first voltage into a fourth voltage to power the controller when receiving the start signal. The switching unit is coupled to the controller and the first convertor for disabling the first convertor when the controller receives the fourth voltage. A related power supply unit is also provided.

REFERENCES:
patent: 6121761 (2000-09-01), Herbert
patent: 6452364 (2002-09-01), Saeki et al.
patent: 7221128 (2007-05-01), Usui et al.
patent: 7830675 (2010-11-01), Nagai et al.
patent: 2008/0175027 (2008-07-01), Shimada et al.
patent: 1209680 (1999-03-01), None

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