Switching regulator operating in a continuous and discontinuous

Details Switching regulator operating in a continuous and discontinuous Switching regulator operating in a continuous and discontinuous

1991-11-08

1992-12-08

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

323222, 323285, 323288, H02M 3335, H02M 3156

Patent

active

051703335

ABSTRACT:
A switching regulator operates either in the discontinuous mode or in the continuous mode depending on the magnitude of a load current. A mode detector outputs a mode signal Vg indicative of whether the switching regulator is operating in the discontinuous mode or in the continuous mode. In accordance with the mode signal Vg, an error amplifier selectively operates with a first feedback ratio or a second feedback ratio so as to output an error signal Ver indicative of the variation of an output voltage of the regulator. The error signal Ver is then supplied to a PWM (pulse-width modulation) comparator which in turn outputs a PWM signal in accordance with the error signal. The PWM signal drives a switching transistor to switch an input voltage of the switching regulator.

REFERENCES:
patent: 4688158 (1987-08-01), Peterson et al.
patent: 4739234 (1988-04-01), Nolan et al.
patent: 4884183 (1989-11-01), Sable

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