Method of forming a PWM controller and structure therefor

Electric power conversion systems – Current conversion – Including automatic or integral protection means

Reexamination Certificate

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C361S092000, C361S097000

Reexamination Certificate

active

07961485

ABSTRACT:
In one embodiment, a PWM controller is configured to inhibit forming a drive signal responsively to an overload sense signal having a value that is no greater than a first value for a first time interval and to form a first duration of the first time interval responsively to the overload sense signal.

REFERENCES:
patent: 4368500 (1983-01-01), Conroy et al.
patent: 5073724 (1991-12-01), Fox
patent: 7116564 (2006-10-01), Takahashi
patent: 2006/0209481 (2006-09-01), Kim et al.
Data Sheet, “NCP1271 Mode Standby PWM Controller with Adjustable Skip Level and External Latch”, Copyright Jun. 2007—Rev. 4, Semiconductor Components Industries, LLC., 19 pages.
Data Sheet, 'NCP1351 Variable Off Time PWM Controller, Copyright June, 207—Rev. 2, Semiconductor Components Industries, LLC, 25 pages.

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