Switching power supply unit

Details Switching power supply unit Switching power supply unit

2005-03-18

2010-06-22

Vu, Bao Q (Department: 2838)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S093800, C361S103000

Reexamination Certificate

active

07742305

ABSTRACT:
A switching power supply having at least one switch (S) controlled by a control circuit (AST), by means of which an input direct voltage (UV) is switched, whereby a thermal model (THM) is implemented in a control (STE), by means of which the temperature of at least one component (S; D3, D4, UET) can be calculated or estimated, and at least one current value that is load-dependent is made available as an electrical quantity to the thermal model, the control (STE) is directed at outputting at least one limiting signal (abs, ala) when a limiting value or a function of multiple limiting values depending on calculated or estimated temperature values is reached, which is usable in the sense of an action to reduce temperature, and which produces at least one limiting signal (abs) to the control circuit in the sense of a temperature reduction and thus a power reduction.

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International Search Report, PCT/AT03/00278 mailed Feb. 12, 2004 (4 pages).

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