Electric power supply apparatus having input switching circuit

Details Electric power supply apparatus having input switching circuit Electric power supply apparatus having input switching circuit

2006-09-12

2006-09-12

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

C323S238000, C323S285000

Reexamination Certificate

active

07106031

ABSTRACT:
In a power supply apparatus, a switching circuit selectively applies one of an input voltage of a power converting circuit and an output voltage of the power converting circuit to a voltage reducing power supply circuit. When the input voltage is applied to the power converting circuit, the switching circuit selects this input voltage, so that the output voltage of the voltage reducing power supply circuit can quickly rise. Thereafter, when the output voltage of the power converting circuit exceeds this output voltage, the switching circuit selects the output voltage of the power converting circuit. As a result, a difference between the input voltage and the output voltage of the voltage reducing power supply circuit is decreased. Thus, a power loss is lowered and noise produced in the power converting circuit is suppressed.

REFERENCES:
patent: 4814685 (1989-03-01), Renger
patent: 6166527 (2000-12-01), Dwelley et al.
patent: 6259234 (2001-07-01), Perol
patent: 6509721 (2003-01-01), Liebler
patent: A-6-335238 (1994-12-01), None

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