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What Is The Interference To The Power Adapter?

Shenzhen GEO Technology Co.,Ltd | Updated: Sep 29, 2017

What is the interference to the power adapter?

External anti-interference ability, such as surge, lightning, should optimize the AC input and DC output port lightning protection capability. Lightning can be used zinc oxide varistor and gas discharge tube combination of methods to solve.

Reducing the area surrounded by the high voltage high current line, especially the primary side of the transformer and the switching tube and the power supply filter capacitor circuit, reducing the area surrounded by the output rectifier circuit and the freewheeling diode circuit and the DC filter circuit, power adapter reducing the leakage inductance of the transformer, Filter capacitor capacitance; the use of high resonant frequency filter capacitors.

Reduce the internal interference of the power adapter, should start from the following aspects: Note that the digital circuit and analog circuit single point ground, high current circuit and small current, especially the current, power adapter voltage sampling circuit of a single point of grounding to reduce the total interference interference, Reduce the impact of the ground ring; wiring attention to the adjacent line spacing and signal nature, to avoid crosstalk; reduce the ground impedance;

For electrostatic discharge, the use of TVS tube and the corresponding ground protection, increase the small signal circuit and the distance between the chassis, power adapter or use anti-static interference device to solve.