Direct current power supply device, power supply device for...

Details Direct current power supply device, power supply device for... Direct current power supply device, power supply device for...

2011-07-12

2011-07-12

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

C315S18500S, C315S307000, C315S224000, C315S312000

Reexamination Certificate

active

07977890

ABSTRACT:
Disclosed is a direct-current power supply device, including: an inductor; a switching element to intermittently supply a current to the inductor; an external terminal to which an output current of an external unit is fed back; a control circuit to generate a pulse signal having a pulse width corresponding to an output voltage of the external terminal, generate a drive signal for driving the switching element in response to the pulse signal, and output the drive signal to the switching element; a variable current source which is connected to the external terminal and which is turned on and off in response to a shutdown signal; and a discharge unit which is connected between the external terminal and a ground point and which is turned on in response to the shutdown signal so that the output current fed back to the external terminal is discharged into the ground point.

REFERENCES:
patent: 2003-152224 (2003-05-01), None

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