Hello,
So I was playing around with a bc337-25 a npn bjt.
I am trying to power a 3.3V circuit and use the transistor as a switch. The thing is I don't get 3.3v to power the circuit.
The 3.3V comes from a regulated 5V. 3.3V is supplied to the circuit and base of the bjt.
So I have Ib=Ic/beta, IB should be 100mA (what the circuit needs)/160(worst beta of bc337-25) = 0,6mA should be supplied to achieve the 100mA.
Rb=(3.3V-Vbeo)/0,0006A = (3.3V-1.2V)/0,0006A = 3,5kO.
so now I try to hook up the circuit but I get around 1,2V and around 16mA.
Any help is appreciated.
datasheet: https://www.onsemi.com/pub/Collateral/BC337-D.PDF
So I was playing around with a bc337-25 a npn bjt.
I am trying to power a 3.3V circuit and use the transistor as a switch. The thing is I don't get 3.3v to power the circuit.
The 3.3V comes from a regulated 5V. 3.3V is supplied to the circuit and base of the bjt.
So I have Ib=Ic/beta, IB should be 100mA (what the circuit needs)/160(worst beta of bc337-25) = 0,6mA should be supplied to achieve the 100mA.
Rb=(3.3V-Vbeo)/0,0006A = (3.3V-1.2V)/0,0006A = 3,5kO.
so now I try to hook up the circuit but I get around 1,2V and around 16mA.
Any help is appreciated.
datasheet: https://www.onsemi.com/pub/Collateral/BC337-D.PDF