Constant voltage power supply circuit and method of testing...

Details Constant voltage power supply circuit and method of testing... Constant voltage power supply circuit and method of testing...

2007-09-11

2007-09-11

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

Reexamination Certificate

active

11370914

ABSTRACT:
A constant voltage power supply circuit is provided with a constant voltage circuit part to convert an input voltage into a predetermined constant voltage, a first excessive current protection circuit part to control the constant voltage circuit part so as to reduce the output voltage while maintaining an output current that is output to a predetermined maximum value if the output current is greater than or equal to the predetermined maximum value when the output voltage is a rated voltage, and a second excessive current protection circuit part to control the constant voltage circuit part so as to reduce the output voltage and the output current and to output a short-circuit current if the output voltage decreases to a ground voltage when the output voltage is decreased to a predetermined value by the first excessive current protection circuit part. The second excessive current protection circuit part is disabled in response to a first test signal that is active.

REFERENCES:
patent: 6529065 (2003-03-01), Forstner et al.
patent: 7042280 (2006-05-01), Huang et al.
patent: 2002-169618 (2002-06-01), None
patent: 2003-067062 (2003-03-01), None

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