The output voltage of LNK564 chip is unstable and uneven in mass production.
Pi Engineering: Hello! About LNK564 in mass production. It is found that the output voltage of the chip is unstable, there is no constant current and constant voltage, and the output voltage error is very large. And loud. The high-frequency parameters were previously calculated by engineers at Pi. Output 8.1 v 0.3 a using EE16 hf. R 147K1% r 23k1% see annex. Then with the high-frequency manufacturers, check the high-frequency production process and leakage inductance. The high-frequency production process has also been improved. But the result was the same. Can you run the high-frequency parameters again for me.