Multi-fault protected high side switch with current sense

Details Multi-fault protected high side switch with current sense Multi-fault protected high side switch with current sense

2003-05-20

2008-05-13

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C327S434000, C327S436000, C327S437000

Reexamination Certificate

active

07372685

ABSTRACT:
An integrated high side switch with multi-fault protection. When a fault condition is detected, the switch is turned off. The switch includes a pair of transistors that are connected such that the source of the first transistor is connected with the source of the second transistor. The drain of the first transistor is thus connected to the supply voltage. A first current mirror generates a current sense output. A second current mirror generates an internal current to detect an over current fault condition. The transistors in the current mirrors are connected like the switch transistors. A high voltage operational amplifier and a transistor are used as feedback to insure that the voltage at the output of the current mirrors matches the voltage at the output of the switch. This ensures that the current mirrors generate scaled versions of the current flowing through the switch.

REFERENCES:
patent: 4750079 (1988-06-01), Fay et al.
patent: 5184272 (1993-02-01), Suda et al.
patent: 5372410 (1994-12-01), Miller et al.
patent: 5396117 (1995-03-01), Housen et al.
patent: 5438489 (1995-08-01), Judy et al.
patent: 5459732 (1995-10-01), Wise et al.
patent: 5621601 (1997-04-01), Fujihira et al.
patent: 6011413 (2000-01-01), Hayakawa et al.
patent: 6028438 (2000-02-01), Gillette
patent: 6154012 (2000-11-01), Drori
patent: 6160304 (2000-12-01), Ludikhuize
patent: 6259306 (2001-07-01), Brulhart et al.
patent: 6323703 (2001-11-01), Fotouhi
patent: 6330143 (2001-12-01), Maly et al.
patent: 6407532 (2002-06-01), Ruha
patent: 6509781 (2003-01-01), Dufort
patent: 6678829 (2004-01-01), Teggatz et al.
patent: 6836148 (2004-12-01), Pullen et al.
patent: 2002/0024376 (2002-02-01), Sander
A. Sedra, Microelectronic Circuits, 1987, Holt, Rine and Winston, 2nd edition, pp. 342-345.
Horowitz et al. The Art of Electronics, 1989, Cambridge Ubniversity Press, pp. 117-118.

Affiliated with

Also associated with

Rating

Multi-fault protected high side switch with current sense does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-fault protected high side switch with current sense, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-fault protected high side switch with current sense will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3984909