Switching power supply

Details Switching power supply Switching power supply

2007-04-03

2007-04-03

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C363S020000

Reexamination Certificate

active

11227338

ABSTRACT:
A switching power supply unit, for switching a rectified voltage supplied to a pulse transformer to supply a specified load voltage to a load connected to the secondary winding of the pulse transformer, wherein at the time of normal operation, a rectified voltage is supplied via a first resistor to a power supply terminal of a control circuit, together with supply of a voltage generated at a drive winding of the pulse transformer to the power supply terminal via a diode, and at the time of standby operation, a standby signal from outside indicating that the switching power supply unit has been put into standby mode is received, and it is possible to completely cut-off supply of power to a control section of the switching power supply unit constituting a main power supply when in standby mode, by supplying a voltage that is lower than a power supply threshold voltage capable of operating a control circuit to the power supply terminal.

REFERENCES:
patent: 6563720 (2003-05-01), Kitano
patent: 6646894 (2003-11-01), Hong et al.
patent: 6922345 (2005-07-01), Nishida et al.

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