Method and circuit for controlling and monitoring a load

Details Method and circuit for controlling and monitoring a load Method and circuit for controlling and monitoring a load

1994-10-05

1996-04-23

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 98, 307116, 371 48, H02H 314

Patent

active

055109500

ABSTRACT:
A method and circuit is provided which controls and monitors a load through a single I/O pin of a microprocessor. A predriver circuit including a level shifter responds to a driver control signal from the microprocessor to control energization of a power driver connected in a load circuit. The predriver circuit also includes a monitor stage for detecting fault conditions of the load circuit. The output of the monitor stage is connected with the I/O pin which is configured as either an input or an output pin under microprocessor program control.

REFERENCES:
patent: 4612638 (1986-09-01), Kissel
patent: 4701867 (1987-10-01), Bruggemann
patent: 4740723 (1988-04-01), Sugayama et al.
patent: 4764884 (1988-08-01), Noyori
patent: 5075669 (1991-12-01), Nakadozono et al.
patent: 5119312 (1992-06-01), Groger et al.

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