Control circuit and method for a temperature sensitive device

Details Control circuit and method for a temperature sensitive device Control circuit and method for a temperature sensitive device

1998-04-16

1999-10-26

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327143, 327538, 327512, H03K 302, H01L 3500

Patent

active

059735287

ABSTRACT:
An embodiment of the present invention is a switching power supply that includes a power switching device and a control circuit to control the power switching device. Under normal operational conditions the power required by the power switching device is provided by an auxiliary secondary winding of the transformer of the power supply. When the temperature sensitive device gets into an unallowed operational condition this is no longer possible and as a consequence the device is disabled for a period of time which is determined by the amount of overheating of the device.

REFERENCES:
patent: 4378580 (1983-03-01), Stich
"MC33364, Product preview critical conduction SMPS controller", Motorola Semiconductor technical data, Rev Aug. 21, 1996 one page and MC33364--Rev. Jun. 24, 1996 with 4 pages.
"MC33368, Advance Information Power Factor Controller", Motorola Semiconductor Technical data, Sep. 26, 1995, MC33368 Rev 2, pp. 1-12.

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