Switching constant-current power supply

Details Switching constant-current power supply Switching constant-current power supply

2005-06-21

2005-06-21

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S224000, C307S085000, C307S086000

Reexamination Certificate

active

06909249

ABSTRACT:
Disclosed herein is a switching constant-current power supply which comprises: a switching-system power converter for supplying a predetermined current to a load; a current detector for generating a feedback signal in correspondence with the load current; a controller for driving the power converter in correspondence with the feedback signal; and a feedback circuit, which is provided between the current detector and the controller, and comprises a signal holding unit, the feedback circuit supplying either a first feedback signal, output from the current detector, or a second feedback signal, output from the signal holding unit, to the controller; the size of the second feedback signal being approximately equal to the first feedback signal at a given time.

REFERENCES:
patent: 6509700 (2003-01-01), Nakatsuka et al.
patent: 2004/0032223 (2004-02-01), Henry
patent: 53-78418 (1978-07-01), None
patent: 09-065663 (1997-03-01), None
patent: 10/014236 (1998-01-01), None
patent: 11-069791 (1999-03-01), None
patent: 2000-287460 (2000-10-01), None

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