Power supply apparatus

Details Power supply apparatus Power supply apparatus

2007-12-11

2007-12-11

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

External or operator controlled

Using a three or more terminal semiconductive device as the...

C323S271000, C323S351000

Reexamination Certificate

active

11624758

ABSTRACT:
In a power supply apparatus, in a standby mode, control signals for controlling a first MOSFET of a power supply apparatus to be turned on and a second MOSFET to be turned off are supplied to the gates of the first and second MOSFETs from a control circuit, respectively. The emitter of a PNP transistor is connected to the gate of the second MOSFET through a diode of a switch circuit and the collector is connected to the ground. A power supply operation control signal is input to the base of the PNP transistor. When a power supply operation control signal in a Low state is input to the base in a standby mode, the emitter and the collector are connected to each other. Accordingly, the gate of the second MOSFET has a potential substantially the same as a ground potential and the second MOSFET is turned off irrespective of the control signal.

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Official Communication for PCT Application No. PCT/JP2006/315313; mailed on Sep. 12, 2006.

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