how to clip a voltage to 3.3V by switching transistor such a

B

blue sky

Guest
The board have a 3.3v refence voltage. Another input voltage can
change from 1.5V to 5.5V, but need to clip to 3.3v.
Vout =Vin (Vin <3.3V)
Vout =3.3v (VIN >=3.3V)
If I want to use Infineon's switching transistor (SMBT3904/SMBT3906),
how to design it? I know its a simple question, I'm just a beginer in
hardware design.
Any tips is welcome.
 
"blue sky" <hbguan@163.net> schreef in bericht
news:f1e4b2b2.0404101826.4481807d@posting.google.com...
The board have a 3.3v refence voltage. Another input voltage can
change from 1.5V to 5.5V, but need to clip to 3.3v.
Vout =Vin (Vin <3.3V)
Vout =3.3v (VIN >=3.3V)
If I want to use Infineon's switching transistor (SMBT3904/SMBT3906),
how to design it? I know its a simple question, I'm just a beginer in
hardware design.
Any tips is welcome.
Click to expand...
Look at:
http://www.romanblack.com/smps.htm

petrus


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