Network card power supply circuit using SC1470 control chip

Network card power supply circuit using SC1470 control chip

Shown is the network card power supply circuit using the SC1470 control chip . The circuit is composed of an SC1470 and two switching field effect transistors. SC1470 is a control circuit that generates PWM pulse signals. When working, pin ⑨ and pin @ respectively output two PWM pulse signals with opposite phases. The QI and Q2 field effect transistors work alternately under the action of the PWM signal, turning the DC power supply of the battery into switching pulses. After LC filtering, they output a 1.2 V DC voltage to power Aka.