Thermal protection circuit with thermally dependent switching si

Details Thermal protection circuit with thermally dependent switching si Thermal protection circuit with thermally dependent switching si

1999-08-12

2000-10-03

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361103, 327512, 327513, H02H 504

Patent

active

061281727

ABSTRACT:
A thermal protection circuit having a reduced current consumption and requiring a reduced number of components, includes a first, a second, and a third current source. The third current source has a first transistor with an emitter connected to a first voltage supply terminal, a collector, and a base connected to the collector of the first transistor, and has a second transistor with a base, a collector connected to the collector of the first transistor and to the base of the first transistor. A voltage divider has a tap, a first voltage divider terminal connected to a second voltage supply terminal, and a second voltage divider terminal connected to the third current source. A third transistor has an emitter connected to the second voltage supply terminal, a collector connected to the first current source, and a base connected to the tap of the voltage divider. A temperature-dependent switching signal can be tapped at the collector of the third transistor. A fourth transistor has an emitter connected to the second voltage supply terminal, a base connected to the second voltage divider terminal, and a collector connected to the second current source and to the base of the second transistor.

REFERENCES:
patent: 3825778 (1974-07-01), Ahmed
patent: 4667265 (1987-05-01), Stanojevic et al.
patent: 4701639 (1987-10-01), Stanojevic
patent: 4789819 (1988-12-01), Nelson
patent: 5099381 (1992-03-01), Wilcox
patent: 5349286 (1994-09-01), Marshall et al.
patent: 5589792 (1996-12-01), Brokaw
patent: 5654861 (1997-08-01), Pennisi
patent: 5796280 (1998-08-01), Tuozzolo
"Smart Power Ics", B Murari et al., Springer, 1996, pp. 423-427 (no month available).

Affiliated with

Also associated with

Rating

Thermal protection circuit with thermally dependent switching si does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermal protection circuit with thermally dependent switching si, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal protection circuit with thermally dependent switching si will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-201615