Inverter voltage starting circuit

Inverter voltage starting circuit

Shown is the voltage starting circuit of the inverter . Its main component is Ql, and its main function is to provide the starting signal for the PWM control chip (TL1451CNS).     When the power is turned on to start the display, the ⑤ pin of the plug-in CNI receives the high-level start command from the control circuit. This high level is added to the ④ pin of the start-up voltage conversion circuit QI. There are 2 transistors and bias inside Ql. element. Pin @ is the power supply terminal, pin ④ is the control signal input terminal, and pin ② is the output terminal. When starting up, the +14 V voltage supplied by the power adapter is added to the power supply terminal @ pin of the PWM control chip IC2 through the ②~③ pins of QI .