Quick-start and overvoltage protection for a switching regulator

Details Quick-start and overvoltage protection for a switching regulator Quick-start and overvoltage protection for a switching regulator

Filed on

1992-06-08

Date issued

1994-10-25

Examiner

Voeltz, Emanuel T.

Patent Class

Electricity: power supply or regulation systems

SubClass

Output level responsive

SubSubClass

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

Other Related Categories

323901, 363 49, 361 18, G05F 156

Type

Patent

Status

active

Patent number

053592816

Description

ABSTRACT:
A switching regulator controls the pulse width to a gate of a switching power transistor to maintain an average output voltage. An error amplifier in the regulation loop detects the difference between the actual output voltage and its desired value and maintains the proper regulation voltage at a loop node to control the pulse width to the gate of the power transistor. A quick-start circuit establishes a minimum loop regulation voltage at the loop node during power up allowing the error amplifier to begin regulating immediately thereby reducing start-up delay. The quick-start circuit is disabled after the loop node reaches the minimum loop regulation voltage. The switching regulator also monitors the output voltage by the same input pin to detect an overvoltage condition and shuts down the power switching transistor accordingly.

REFERENCES:
patent: 4563733 (1986-01-01), Schlenk
patent: 4621313 (1986-11-01), Kiteley
patent: 4625271 (1986-11-01), Chetty et al.
patent: 4716510 (1987-12-01), Pace et al.
patent: 4806842 (1989-02-01), Bittner

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