Adaptive duty-cycle limiting for overload protection of integrat

Details Adaptive duty-cycle limiting for overload protection of integrat Adaptive duty-cycle limiting for overload protection of integrat

1994-11-21

1996-08-27

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361 93, 361115, H02H 500

Patent

active

055507026

ABSTRACT:
A technique for which integrated circuit duty-cycle control or pulse width current limiting adaptively responds to the load, allowing a brief inrush current event upon startup of the load, while restricting long-term power dissipation to a lower value. Upon sensing an overcurrent condition, a duty cycle control circuit causes the output to be placed into a high duty-cycle mode of operation to provide sufficient power to the load. A thermal sense circuit provides additional control because if the overcurrent condition continues and the junction temperature rises to the thermal sense trip point, the duty cycle control circuit places the output in a lower duty-cycle mode.

REFERENCES:
patent: 4599548 (1986-07-01), Schultz

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