Constant-voltage power supply circuit

Details Constant-voltage power supply circuit Constant-voltage power supply circuit

2006-08-15

2006-08-15

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

Reexamination Certificate

active

07092226

ABSTRACT:
A constant-voltage power supply circuit includes a constant-voltage output unit and an output current restriction unit. The constant-voltage output unit includes an output transistor and controls the transistor based on output voltage from the output transistor to maintain the output voltage constant. The output current restriction unit restricts output current of the constant-voltage output unit. When the overcurrent detection unit detects that current flowing through the output transistor that is an overcurrent flowing continuously for a predetermined time, the output current restriction unit executes an output current restriction operation. This configuration prevents the output voltage from decreasing after an overcurrent control operation.

REFERENCES:
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patent: 06-022447 (1994-01-01), None
patent: 06-105450 (1994-04-01), None
patent: 2001-025149 (2001-01-01), None
patent: 2001-265454 (2001-09-01), None
patent: 2001-333528 (2001-11-01), None
patent: 2003-33010 (2003-01-01), None

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