Active full wave bridge rectifier

472

04:20:45

Using op-amps, we can drive an H-bridge configuration of MOSFETs to deliver more efficient DC output to our device of choice.
Don't ask me where the +170VDC comes from to power the op-amps to begin with...

I would *guess* that you *could* power them from the output of the device itself, but, I can't guarantee that it'll hit some state where enough current leaks though to begin a cascade positive feedback amplification to kickstart itself 🤷🏻‍♂️

Possibly use some high value resistors in series with some regular diode bridge rectifier, just to kickstart the op-amp's 🤷🏻‍♂️

published 3 years ago

SuperFaradCapacitor

3 years ago

To power the op amps, I would just use a capacitive dropper and an FBR (or a single diode if that would work) to power the op amps. Op amps don’t use much power, so the circuit to power them won’t produce much power loss.

SuperFaradCapacitor

3 years ago

A single diode rectifier would not work with a capacitive dropper. But a full bridge does.

faceblast

3 years ago

🤷‍♂️

ViolationMad

3 years ago

MOSFETs with a Vgs(max) of ~170V is nothing I've ever heard of. I've never used anything above 20V and a quick search ok digikey doesn't give any useful results after 50V either. Anyway I don't see why you would want to drive them with such a high voltage.

ETJAKEOC

3 years ago

Most of my circuits shouldn't be taken for face value, I don't actually model real components, I just tweak these values here until I get the results I want lol

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