Over-current protection circuit for voltage regulator

Details Over-current protection circuit for voltage regulator Over-current protection circuit for voltage regulator

1977-04-21

1978-11-28

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

H02H 720

Patent

active

041278860

ABSTRACT:
A control transistor in the over-current protection circuitry of a voltage regulator is connected in a regenerative latch circuit with a complementary-conductivity auxiliary transistor, whereby conduction once initiated in said control transistor tends to be sustained. This avoids the tendency towards rapid oscillation between shut-down and power-up conditions in the over-current protection circuitry. The regenerative latch circuit loads the capacitor that supplies its sustaining current so heavily that the potential there-across decays, the decay finally advancing to the point where regeneration halts. The resulting non-conduction of the control transistor permits the voltage regulator to attempt to resume the power-up condition.

REFERENCES:
patent: 3988643 (1976-10-01), Morris
patent: 4013925 (1977-03-01), Tice et al.
patent: 4017789 (1977-04-01), Morris

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