System and method for current overload response with class D...

Details System and method for current overload response with class D... System and method for current overload response with class D...

2006-02-02

2008-12-09

Leja, Ronald W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

07463469

ABSTRACT:
A system and method for responding to a current overload condition in a power switch provides a class D topology that applies a current sink or current source to the gate of the power switch. The current sink or source decreases or increases current flowing through the power switch to regulate power switch output current in the event of an overload. A timer for current regulation can be provided to shut off the power switch if the overload condition persists. A set of differently rated switches can be used separately or together to provide a range of current regulation response, from a wide regulation range with a fast response, to a narrow regulation range with a slow response. The system provides a rapid response to an overload condition and output current regulation without disabling the power switch to overcome short term overloads.

REFERENCES:
patent: 4709160 (1987-11-01), Kinoshita
patent: 5239255 (1993-08-01), Schanin et al.

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