Non-dissipative series voltage switching regulator having improv

Details Non-dissipative series voltage switching regulator having improv Non-dissipative series voltage switching regulator having improv

1987-05-11

1988-12-20

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

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

307571, G05F 156, H02M 3156

Patent

active

047927461

ABSTRACT:
A FET switching regulator has a FET switch which is periodically turned on to couple an unregulated DC input voltage to an output filter which develops a regulated output DC voltage. Regulation of the output DC voltage is determined by the on time or duty cycle of the FET switch. A periodic waveform is developed by a pulse-width modulator. The pulse-width modulator compares the input and output DC voltages to a reference voltage to pulse-width modulate the periodic waveform to determine the duty cycle. When the periodic waveform goes high, it triggers a first regenerative circuit which drives the gate of the FET switch into saturation within 20-30 nanoseconds. When the periodic waveform goes low, a second regenerative circuit is triggered to return the FET switch to an off state within 20-30 nanoseconds. Accordingly, the FET switch may be operated at frequencies approaching 500 kHz without excessive power losses within the FET switch in the transitory states between cutoff and saturation. The regenerative circuits may be blocking oscillators.

REFERENCES:
patent: 4445055 (1985-04-01), Bete
patent: 4455526 (1984-06-01), Miller
patent: 4459539 (1984-07-01), Cordy
patent: 4521725 (1985-06-01), Phaneuf
patent: 4553082 (1985-11-01), Nesler
patent: 4565931 (1986-01-01), Fumey
patent: 4607210 (1986-08-01), Ohms et al.
patent: 4634903 (1987-01-01), Montorfano et al.

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