buiducthang
Junior Member level 3
Hi everyone. I have designed a power supply with high current. I used 7805 with B688 follow this diagram:
But in this diagram, when current is about 400mA, Transistor become hot a lot.
I dont know why. My transistor is B688. I try using many difference resistor but it is not effect. B688 is still hot.
Who can help solve it.
Thanks very much.
But in this diagram, when current is about 400mA, Transistor become hot a lot.
I dont know why. My transistor is B688. I try using many difference resistor but it is not effect. B688 is still hot.
Who can help solve it.
Thanks very much.