Electronics > Projects, Designs, and Technical Stuff
What is "floated" linear voltage regulator?
(1/13) > >>
001:
Hi!

I hear something about "floated" linear voltage regulator. But what it is actually?  :-//
capt bullshot:
Difficult to answer without context.
It might refer to some regulator circuitry that has an pass element (usually some kind of transistor) and a regulation circuit built around the pass element. The regulation circuits "GND" potential is tied to the pass elements output (e.g. the emitter of an BJT), and has a floating supply independent from its input and output. Output voltage sensing is from output "GND" (that isn't identical to the regulator "GND") to output voltage.
This is a common style for many lab power supplies, one main advantage is that the regulator circuitry doesn't have to operate from the main supply. Only the pass element has to stand the input to output voltage difference. So common +/- 12V operated OP-Amps can be used to build e.g. a 0 ... 200V supply.

MiDi:
LM317/337 are examples, they are specified for maximum voltage between input and output and have no reference to GND.
For example they are suitable for 200V input and 180V output.
But care is needed that you ALWAYS keep input and output difference inside specs, this is a problem on startup and if output could have short circuit.
SiliconWizard:
I have heard of "floated wood", but floated regulators? Hmm.
 :-//
MiDi:

--- Quote from: SiliconWizard on November 20, 2018, 04:58:36 pm ---I have heard of "floated wood", but floated regulators? Hmm.
 :-//

--- End quote ---

You know what he means  8)
-> floating
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod