Circuit for AC adapter to reduce power drawn from an AC...

Details Circuit for AC adapter to reduce power drawn from an AC... Circuit for AC adapter to reduce power drawn from an AC...

2005-03-08

2005-03-08

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S021150, C363S021180

Reexamination Certificate

active

06865094

ABSTRACT:
An AC adapter which reduces the amount of power drawn from an AC power source when a system is disconnected from the adapter, includes: a rectifier bridge for rectifying an AC voltage from an AC power supply; a conversion circuit coupled to the rectifier bridge for converting the rectified AC voltage to a DC voltage; and an opto-coupler coupled to the conversion circuit for monitoring an output connection of the circuit, wherein when a system is not coupled to the output connection, the opto-coupler substantially prevents the AC voltage from being drawn from the AC power supply. The adapter circuit uses an opto-coupler comprising a diode and a transistor to reduce the amount of current drawn from an AC power supply when a system is not connected to the AC adapter. In this manner, the AC adapter is prevented from becoming heated when no system is connected.

REFERENCES:
patent: 4318168 (1982-03-01), Faxon
patent: 4400767 (1983-08-01), Fenter
patent: 4459651 (1984-07-01), Fenter
patent: 4499531 (1985-02-01), Bray
patent: 4791546 (1988-12-01), Carroll
patent: 4849869 (1989-07-01), Tanuma et al.
patent: 5055991 (1991-10-01), Carroll et al.
patent: 5184290 (1993-02-01), Ozawa et al.
patent: 5282122 (1994-01-01), Summer
patent: 5301095 (1994-04-01), Teramoto et al.
patent: 5313381 (1994-05-01), Balakrishnan
patent: 5341179 (1994-08-01), Konishi
patent: 5414611 (1995-05-01), Muto et al.
patent: 5475579 (1995-12-01), John et al.
patent: 5513088 (1996-04-01), Williamson
patent: 5638262 (1997-06-01), Brown
patent: 5671131 (1997-09-01), Brown
patent: 5675485 (1997-10-01), Seong
patent: 5862044 (1999-01-01), Shioya et al.
patent: 5925278 (1999-07-01), Hirst
patent: 5982639 (1999-11-01), Balakirshnan
patent: 6094362 (2000-07-01), Domingo
patent: 6125046 (2000-09-01), Jang et al.
patent: 6362980 (2002-03-01), Ohashi et al.

Affiliated with

Also associated with

Rating

Circuit for AC adapter to reduce power drawn from an AC... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for AC adapter to reduce power drawn from an AC..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for AC adapter to reduce power drawn from an AC... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3416598