Load drive control apparatus with performances of...

Details Load drive control apparatus with performances of... Load drive control apparatus with performances of...

2006-08-08

2006-08-08

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

C323S351000

Reexamination Certificate

active

07088565

ABSTRACT:
A load drive control apparatus comprises a drive control circuit and a mode switchover circuit. The drive control circuit, which operates under a driving power, for driving/controlling a load on a control signal. The drive/control of the load includes an overheat protection control with a hysteresis characteristic carried out on a temperature of a component of the drive control circuit and/or the load. The overheat protection control involves a drive-limiting operation to stop a drive of the load. The mode switchover circuit switches over the drive control circuit between a normal mode and a stand-by mode responsively to the control signal. The stand-by mode is less in driving power consumption than the normal mode. The stop of the drive of the load is maintained during the drive-limiting operation whatever the control signal indicates, as long as the temperature is higher than a lower limit of the hysteresis characteristic.

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patent: 2001-257818 (2001-09-01), None

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