Precharger for short circuit detector

Details Precharger for short circuit detector Precharger for short circuit detector

1989-05-26

1993-02-16

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

307246, 307109, 320 1, 323901, 361110, H02H 3093, H02J 1500

Patent

active

051876310

ABSTRACT:
A circuit for controlling the power supply of an electrical load, having a device for detecting a short-circuit of the load. The detection device has a comparator which supplies a signal representative of a short-circuit state of the load when the voltage at the terminals of that load, after filtering, is below a reference voltage Vref. The device has a circuit for rapidly pre-charging a capacitor of the filter, when the load is switched on. The initial time interval during which the output signal of the comparator is not representative of the presence or absence of a short-circuit is thus reduced. The circuit is applicable to the control of actuators in motor vehicle electronics.

REFERENCES:
patent: 3733540 (1973-05-01), Hawkins
patent: 4016461 (1977-04-01), Roland
patent: 4106498 (1978-08-01), Haney
patent: 4423457 (1983-12-01), Brajder
patent: 4430682 (1984-02-01), Bassch
patent: 4574232 (1986-03-01), Petty
patent: 4816963 (1989-03-01), Eden

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