A: 3845b switching power supply each pin function and voltage value function :1 pin internal error amplifier output compensation end.
2 pin voltage negative feedback signal input.
Pin 3: electrical sampling connection end.
4 pin internal oscillator RT, Cr connection end.
5 Pin ground terminal.
6 Pin pulse width modulation pulse output.
7 pin DC auxiliary power supply ten poles.
Pin 8 5v reference voltage output. 3845B switching power supply pin function and voltage value.