Load driving device and electrical device using the same

Details Load driving device and electrical device using the same Load driving device and electrical device using the same

2007-10-02

2010-11-23

Fleming, Fritz M. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C361S023000, C361S036000, C361S093100

Reexamination Certificate

active

07839610

ABSTRACT:
A load driving device according to the present invention includes: a first current generation section generating a first current in accordance with a driving current of a load; a second current generation section generating a predetermined second current; an integration section charging and discharging a capacitor in accordance with magnitude relation between the first current and the second current; a comparison section comparing a terminal voltage of the capacitor and a predetermined threshold voltage; and an output section generating a protection signal based on output logic of the comparison section. Such configuration permits appropriately preventing load burnout.

REFERENCES:
patent: 4947091 (1990-08-01), Fukuoka
patent: 5444595 (1995-08-01), Ishikawa et al.
patent: 6831821 (2004-12-01), Ohshima
patent: 7015665 (2006-03-01), Ohshima
patent: 7443645 (2008-10-01), Ohshima
patent: 05-55798 (1993-07-01), None

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