Intelligent power switch and switching apparatus

Details Intelligent power switch and switching apparatus Intelligent power switch and switching apparatus

1997-06-11

1999-04-13

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 93, 361100, 361115, H02H 300

Patent

active

058943943

ABSTRACT:
First threshold corresponding to a large electric current capable of breaking a MOS-FET even if the electric current flows even in a short period is provided for a difference amplifying circuit and second threshold lower than the first threshold is stored in a memory. If a detected electric current value is higher than the first threshold or if a CPU determines that an electric current higher than the second threshold has flowed continuously for a period longer than a predetermined period, the semiconductor switch is switched off.

REFERENCES:
patent: 4825330 (1989-04-01), Walchle
patent: 5272392 (1993-12-01), Wong et al.

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