High side driver circuit with diagnostic output

Details High side driver circuit with diagnostic output High side driver circuit with diagnostic output

1997-05-07

1999-07-13

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327108, 327546, G05F 110, G05F 302

Patent

active

059232102

ABSTRACT:
A high side driver circuit includes a command voltage source, a first switching transistor having a base connected to the command voltage source, an emitter connected to ground, and a collector connected to a second switching transistor base. The second switching transistor includes an emitter connected to an electrical energy source through an internal voltage source. A power transistor includes a gate connected to the second switching transistor collector through a resistor, a drain connected to the electrical energy source through a sense resistor, and a source connected to a load. A diagnostic circuit portion including a comparator establishes a diagnostic output voltage based upon the state of the power transistor and characteristics of the power transistor drain and source for indicating fault conditions of the driver circuit.

REFERENCES:
patent: 5023474 (1991-06-01), Wilcox
patent: 5130598 (1992-07-01), Verheyen et al.
patent: 5361014 (1994-11-01), Antone et al.
patent: 5434527 (1995-07-01), Antone
patent: 5438489 (1995-08-01), Judy et al.
patent: 5467240 (1995-11-01), Williamson et al.
patent: 5546043 (1996-08-01), Pollmeier
patent: 5554954 (1996-09-01), Takahashi
patent: 5625305 (1997-04-01), Hwang

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