Switched mode power converter with over temperature detection

Details Switched mode power converter with over temperature detection Switched mode power converter with over temperature detection

2011-01-11

2011-01-11

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S635000, C340S636180

Reexamination Certificate

active

07868773

ABSTRACT:
An over temperature detector circuit for use in a switching converter including one or more power switches in accordance with an embodiment of the present application includes a silent sense generator connected to at least one power switch and operable to detect a noise level of the switch and to provide a generator output signal indicative of absence of switching noise and a comparator operable to compare a temperature sensor signal from a temperature sensor with a reference voltage to provide an alarm signal indicating an over temperature condition when the temperature sensor signal exceeds the reference voltage, wherein the alarm signal does not indicate an over temperature condition when the generator output signal does not indicate absence of switching noise.

REFERENCES:
patent: 3996481 (1976-12-01), Chu et al.
patent: 5122137 (1992-06-01), Lennox
patent: 5805403 (1998-09-01), Chemla
patent: 7255476 (2007-08-01), Franch et al.
patent: 7304828 (2007-12-01), Shvartsman
patent: 7782585 (2010-08-01), Doi et al.
International Search Report dated Dec. 1, 2008 issued in corresponding International Application No. PCT/US08/10682.

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