CPU power supply circuit using RT9214 chip

CPU power supply circuit using RT9214 chip

Shown is the CPU power supply circuit using RT92 t4 chip . As can be seen from the figure, the +5 V/+12 V from the AIX power supply
supplies power to it through the ⑤ pin of the chip. The +3.3 V/+5V and +12V output from the ATX power supply provide the basic operating voltage for the field effect transistor of the circuit. .
    After the +5 V ~ 12V power supply supplies power to the ⑤ pin of the chip, the oscillator and PWM signal generation circuit in the chip work. The ② and ④ pins of the chip
output two PWM signals with opposite phases, and are added to Ql and Ql respectively. The gate of Q2 turns on the two field effect transistors alternately, and the DC voltage (+3.3v/+5 V/+12 V) provided
by the power supply becomes a switching signal. After being filtered by LC, it is output as required by the CPU . DC voltage.