In order to enhance immunity and suppress disturbance, high-voltage components should choose active devices from four aspects: electromagnetic sensitivity, electromagnetic disturbance emission, chip packaging and power supply voltage;
Since noise current and transient load current are the initial sources of conducted and radiated disturbances, in order to achieve the integrity of the power supply, the high-voltage component PCB should preferably be a multi-layer board to minimize lead inductance;
Measures such as reducing the distributed capacitance to ground of the gate circuit drive line and the input capacitance of the drive gate, and installing local decoupling capacitors and overall decoupling capacitors are all effective measures for active devices to enhance noise immunity.