Start up circuit and current-foldback protection for voltage reg

Details Start up circuit and current-foldback protection for voltage reg Start up circuit and current-foldback protection for voltage reg

1996-09-27

1997-09-09

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

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

323273, 323901, G05F 1573, G05F 140

Patent

active

056660448

ABSTRACT:
A circuit providing start-up capability and foldback protection to a voltage regulator. A start-up circuit provides a start-up signal to initiate current flow to a load and also provides a foldback signal to set a current limit threshold under an over-load or short-circuit condition. A signal generator circuit operating on the regulated output voltage of the voltage regulator provides a current limit signal and a start-up control signal. The start-up circuit provides the start-up signal in response to the start-up control signal. The current limit signal sets the current limit threshold under normal operating conditions after start-up.

REFERENCES:
patent: 3753078 (1973-08-01), Hedel
patent: 3988643 (1976-10-01), Morris
patent: 4016461 (1977-04-01), Roland
patent: 5592072 (1997-01-01), Brown

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