What's wrong in my circuit?
Hello~guys!I'm so happy to be here and I would like to express my grateful to you for spending time on reading my question!
I made a power switch by using MOS (I have forgot what brand it is,but I guess maybe it's this) , I added triode --S8050NPN to control it in the pre-circuit. The led is act as load in my circuit diagram. I don’t understand that why the voltage drop to 0.5V when the load current is bout 1A,and when 2A,it’s 1.2V? Is there any wrong in the circuit? Any idea? Can you?
PC:please look at the following picture:
Is this a good question?