Methods and apparatus for controlling a power supply with improv

Details Methods and apparatus for controlling a power supply with improv Methods and apparatus for controlling a power supply with improv

1998-09-30

2000-01-04

Nguyen, Matthew

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

363 50, H02H 700, H02H 710

Patent

active

06011679&

ABSTRACT:
A technique for controlling a power supply involves receiving a programming signal that indicates a power supply output voltage limit, activating the power supply such that the power supply provides a power supply output voltage according to a power supply threshold voltage, generating a tracking signal that tracks the programming signal, and generating a compare signal according to the tracking signal and an actual value of the power supply output voltage. The technique further involves comparing the compare signal to a protection threshold voltage, maintaining activation of the power supply when the compare signal is less than the protection threshold voltage, and deactivating the power supply when the compare signal is greater than the protection threshold voltage. The protection threshold voltage is independent of the power supply threshold voltage. In particular, a power supply threshold reference source provides the power supply threshold voltage, a protection threshold reference source, which is independent of the power supply threshold reference source, provides the protection threshold voltage.

REFERENCES:
patent: 3925709 (1975-12-01), Mitchell et al.
patent: 4544981 (1985-10-01), Hakooplan
patent: 4975883 (1990-12-01), Baker et al.
patent: 5615097 (1997-03-01), Cross
patent: 5825600 (1998-10-01), Watt
"Product & Applications Handbook 1995-96," Unitrode Integrated Circuits Corporation, Merrimack, NH, pp. 6-158 to 6-165, Jan. 1995.

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