Integrated circuit including an overvoltage protection circuit

Details Integrated circuit including an overvoltage protection circuit Integrated circuit including an overvoltage protection circuit

2006-10-31

2006-10-31

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S309000, C327S314000, C361S091100, C361S111000

Reexamination Certificate

active

07129759

ABSTRACT:
The power IC includes an output transistor M0which controls a current flowing into an L load, a dynamic clamp circuit which clamps an overvoltage, and a clamp control circuit which controls the operation of the dynamic clamp circuit. The clamp control circuit activates the dynamic clamp circuit, which is normally inactive, upon detection of a back EMF by the L load.

REFERENCES:
patent: 5028811 (1991-07-01), Le Roux et al.
patent: 5119265 (1992-06-01), Qualich et al.
patent: 5559656 (1996-09-01), Chokhawala
patent: 5581432 (1996-12-01), Wellnitz et al.
patent: 6087877 (2000-07-01), Gonda et al.
patent: 11-32429 (1999-02-01), None
“Car Electronics and Reliability Enhancement of In-Vehicle Electronic Parts and Devices”, first edition, Technical Institution Co., Ltd., Jul. 31, 1998, p. 31.

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