EVL8009(MP8009) Why Dummy load 860R?

hi
I Bought ELV8009.


The EVL8009 datasheet says to connect two Resistor 820R.

What’s the formula?
I want to know the calculation formula because even if I connect two Resistor 820R.
But 30khz output.

Hello,

Yes, for flyback there is a minimum load required to prevent overshoot on Vout. The two 820R in parallel comes from 12Vout / 30mA dummy load.

Best Regards,
Yu