Re: Need "constant voltage-drop device"


jwallacq@xxxxxxxxxxx wrote:
Is there any kind of 2-terminal device, circuit, or "black box"
commercially available that will automatically maintain a constant
voltage drop between a DC power source and its Load over a very wide
range of supply voltages and load resistances??

For my application, I would need something that maintains a voltage
drop of, say, 100 volts while the power supply output fluctuates from
about 150 volts to 1000 volts, and the load current varies from 1 amp
to 20 amps --- sort of a "super-zener-diode."

Actually, a 100 volt, 20 amp zener diode would be ideal, but as far as
I know, there ain't no such animal.

Suggestions, anyone? TIA, john w.

power transistor with a reversed zener in the emitter lead, resistor
from collector to base, resistor from base to anode of diode. Collector
and emitter are your 2 terminals.

.

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