What are the more important items in power supply testing?

Mainly include cross load, surge, input voltage, ripple noise, output short circuit, over power, conversion efficiency, power factor, response time, timing, noise, conducted radiation, leakage current, high and low temperature tests, etc.

Cross load test: Conduct pull-bias tests on the power supply with four commonly used load types to check the voltage stability of the power supply;

Surge: An instantaneous peak value exceeding the stable value, which includes surge voltage and surge current. Surge is also called surge. As the name suggests, it is an instant overvoltage that exceeds the normal operating voltage. Essentially, a surge is a violent pulse that occurs in just a few millionths of a second. Possible causes of surges include heavy equipment, short circuits, power switching, or large engines.

Leakage current: The current from the filter housing to any end of the AC incoming line under rated AC voltage. . If all ports of the filter are completely insulated from the housing, the value of the leakage current mainly depends on the leakage current of the common mode capacitor CY, that is, it mainly depends on the capacity of CY.