About changes on IEC 62368-1 Edition 4 (drafted) wireless charging test
IEC 62368-1 has drafted Edition 4.This version has some changes for wireless charging test.
Specifically in two areas:
1. New test requirements for wireless charging, including power transfer efficiency, thermal efficiency, harmonics, static power, EMC evaluation, etc.
2. Regarding the power transfer efficiency test, the 4th edition specifies two test methods: one is to use a constant load resistance and test the output voltage and current at the receiving end to calculate the power transfer efficiency; the other is to use a variable load resistance method to determine the maximum power transfer efficiency by adjusting the size of the load resistance.
In addition, IEC62368-1 version 4 also adjusts the classification of electronic products, dividing the original category into three levels: 1, 2 and 3, and also makes different provisions for different levels in its testing requirements. For wireless charging devices, they need to meet the test requirements specified in IEC62368-1, 4th edition.