Switching power supply and method for stopping supply of...

Details Switching power supply and method for stopping supply of... Switching power supply and method for stopping supply of...

2008-04-15

2008-04-15

Paschall, Mark (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S494000, C219S507000, C219S501000, C219S492000, C374S103000

Reexamination Certificate

active

11202760

ABSTRACT:
A switching power supply includes a sensor for detecting that the output level of the switching power supply has exceeded a rated output level, and a memory that stores data for estimating temperature change of a heat-producing component during a period in which the output level is higher than the rated output level. The data is differentiation data of a curve that represents temperature change characteristics of the heat-producing component. An estimated temperature of the heat-producing component is computed based on the time elapsed from when the output level of the switching power supply exceeds the rated output level and the differentiation data. When the estimated temperature of the heat-producing component reaches an upper threshold temperature, a switching element is deactivated.

REFERENCES:
patent: 3566143 (1971-02-01), Paine et al.
patent: 4496829 (1985-01-01), Black et al.
patent: 7233112 (2007-06-01), Burke et al.
patent: 2003-014552 (2003-01-01), None

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