julian403
Full Member level 5
![Full Member level 5](/styles/images/ranks/flevel2.gif)
Hi I still doing the power amplifier. I made the next power ampliffier step
Icmax= 4.3 [A] and the HFE is about 100 so I need a Ibmax=0.03 [A]. But I do not know how make the driver step.
I thought use a TIP41 as commun emitter
![circuito2.png circuito2.png](https://www.edaboard.com/data/attachments/52/52769-3f21e6744d901a9cf0929a34672d0419.jpg)
Where the output of this step is on colector. So, the output impedance that it will see is:
10 [KΩ] // (8.1 [Ω])(HFE+1)
Where the last HFE is the 2SA5200's HFE. But when I try it on the simulator it does not work. What do you thinks? What I must use as driver step? (to drive a current of 0.03[A] on the 2SA... transitor's base?
![circuito.png circuito.png](https://www.edaboard.com/data/attachments/52/52768-ec2ab6b65716e571532300b86faf56b0.jpg)
Icmax= 4.3 [A] and the HFE is about 100 so I need a Ibmax=0.03 [A]. But I do not know how make the driver step.
I thought use a TIP41 as commun emitter
![circuito2.png circuito2.png](https://www.edaboard.com/data/attachments/52/52769-3f21e6744d901a9cf0929a34672d0419.jpg)
Where the output of this step is on colector. So, the output impedance that it will see is:
10 [KΩ] // (8.1 [Ω])(HFE+1)
Where the last HFE is the 2SA5200's HFE. But when I try it on the simulator it does not work. What do you thinks? What I must use as driver step? (to drive a current of 0.03[A] on the 2SA... transitor's base?