Load drive device having short-circuit protection function

Details Load drive device having short-circuit protection function Load drive device having short-circuit protection function

1998-07-06

1999-11-16

Han, Y. J.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

363 50, 363 56, 361 18, G05F 1565, H02H 700

Patent

active

059864427

ABSTRACT:
A load device having a short-circuit protection function is disclosed which is capable of avoiding damage of a switching element such as an output transistor. The load device includes a switching element coupled to a load in series. The switching element operates in response to a drive signal. A power supply supplies a voltage across the series circuit of the load and the switching element. A voltage detection circuit detects a voltage exertion to the load and generates a voltage exertion signal. A short-circuit protection circuit interrupts supply of the drive signal to the switching element when no voltage exertion detection signal appears at the expiration of a predetermined period of time from initiation of the supply of the drive signal.

REFERENCES:
patent: 4979066 (1990-12-01), Kawata et al.
patent: 5297014 (1994-03-01), Saito et al.

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