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BC 547 NPN Transitor Vb, Vee & Beta value?

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rajat

Jun 3, 2012
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Gents,

Sorry I have to break my previous query soft start circuit' into two otherwise it would look length. It is very simple question but I am just a hobbyist trying to understand slowly.

I am trying to replace p-mosfet with BC 547 NPN transistor.
Datasheet
http://datasheet.octopart.com/BC547-Fairchild-datasheet-7074.pdf

Can anyone advise on how can I calculate capacitor and resistor value to be used....assuming it is 12 v battery?

I tried to use this transitor calculator
http://www.csgnetwork.com/transistorcalc.html

But am not sure for what values should I put in for Vb, Vee & Beta

Any advise greatly appreciated.
 

BobK

Jan 5, 2010
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Um, you cannot replace a P channel MOSFET with an NPN transistor, you would need a PNP transistor, unless you are making changes to the surrounding circuitry.

How about showing us a schematic of using the MOSFET.

Bob
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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Starting two threads within minutes of each other about the same thing in the same section of the forum with two totally different subject lines.

You must have been put a lot of thought into what was the most annoying thing you could do.

Carry on with your discussion here: https://www.electronicspoint.com/soft-start-circuit-t263551.html
 
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