Over temperature protection circuit having plural thermal compon

Details Over temperature protection circuit having plural thermal compon Over temperature protection circuit having plural thermal compon

1997-03-31

1998-10-27

Wong, Don

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315225, 315DIG5, H05B 3904

Patent

active

058281886

ABSTRACT:
A circuit arrangement for operating electrical lamps has a temperature sensor (NTC) as component part of an overtemperature protection circuit and at least one additional thermal component, which has flowing through it in the event of an overload a current which is increased compared with normal operation, and is thereby heated. The thermal component, for example one or more heating resistors (R5-R8), is coupled in a thermal manner to the temperature sensor (NTC), as a result of which the overtemperature protection circuit is consequently also triggered in the event of an overload.

REFERENCES:
patent: 4968962 (1990-11-01), Hohider et al.
patent: 5051661 (1991-09-01), Lee
patent: 5321337 (1994-06-01), Hsu
"Schaltnetzteile: Konzepte, Bauelemente, Anwendungen", Hirschmann, 1990, p. 02.
"Stromversorgungen fur die Praxis", Meyer, 1989, pp. 115-116.

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