I have a Load his VCC=5V , I=1.5A
But my power supply is battery his volte=24V dc
I use ka34063 dc to dc converter in step down mode, I use also External NPN Switch (bc337) because IC Peak Greater than 1.5 A.
but the circuit don't work (the power disconnet after few second with the temperature of transistor is very hot)
what the typical value of External NPN Switch transistor I must use.
what is my erorr
Help me Please"¦.