Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Reexamination Certificate
2007-06-05
2007-06-05
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
C361S104000, C327S525000, C702S057000
Reexamination Certificate
active
11207503
ABSTRACT:
A power supply controller having final test and trim circuitry. In one embodiment, a power supply controller for switched mode power supply includes a selector circuit, a trim circuit, a shutdown circuit and a disable circuit. The trim circuit includes a programmable circuit connection that can be selected by the selector circuit by toggling a voltage on an external terminal such as for example a power supply terminal, a control terminal or a function terminal of the power supply controller. The programmable circuit connection in the trim circuit can be programmed by applying a programming voltage to the external terminal. The shutdown circuit shuts down the power supply controller if the temperature rises above an over temperature threshold voltage. The shutdown circuit includes adjustment circuitry that can be used to test the shutdown circuit. The adjustment circuitry can adjust and reduce the over temperature threshold of the power supply controller. Thus, the power supply controller can be tested without having to actually heat the part. The disable circuit includes a programmable circuit connection, which when programmed prevents further trimming of power supply controller and prevents adjustment of the shutdown circuit over temperature threshold.
REFERENCES:
patent: 4550360 (1985-10-01), Dougherty
patent: 4599548 (1986-07-01), Schultz
patent: 4751454 (1988-06-01), Dielacher et al.
patent: 5319370 (1994-06-01), Signore et al.
patent: 5497285 (1996-03-01), Nadd
patent: 5563549 (1996-10-01), Shieh
patent: 5767732 (1998-06-01), Lee et al.
patent: 5838076 (1998-11-01), Zarrabian et al.
patent: 5905370 (1999-05-01), Bryson
patent: 6060899 (2000-05-01), Hamada
patent: 6075354 (2000-06-01), Smith et al.
patent: 6130571 (2000-10-01), Yamamoto
patent: 6388853 (2002-05-01), Balakrishnan et al.
Balakrishnan Balu
Bircan Erdem
Djenguerian Alex B.
Blakely , Sokoloff, Taylor & Zafman LLP
Jackson Stephen W.
Kitov Z
Power Integrations, Inc.
LandOfFree
Method and apparatus providing final test and trimming for a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus providing final test and trimming for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus providing final test and trimming for a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3884240