Current limit circuit in current mode power supplies

Details Current limit circuit in current mode power supplies Current limit circuit in current mode power supplies

1992-09-24

1994-02-08

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 21, H02H 7122, H02H 3335

Patent

active

052853667

ABSTRACT:
A current mode power supply having a switching topology with a pulse width modulated duty cycle with a current sensing resistor is short circuit protected by a current limit circuit. The current limit circuit has inputs coupled to the current sensing resistor and the dc source input. The current limit circuit provide an output signal connected to the pulse width modulator, for shortening the duty cycle in dependence upon the sum of voltage signals from the current sensing resistor and the dc source input.

REFERENCES:
patent: 4037271 (1977-07-01), Keller et al.
patent: 4761702 (1988-08-01), Pinard

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