Could you please elaborate on the operation mode to help better understand the circuit description of EV183-S-00A ?
I have read circuit description at page 10.
Here is what the MP183 datasheet has to say in terms of elaborating more on the operation mode:
“The MP183 is a green-mode operation regulator. Both the current limit (ILIMIT) and the switching frequency (fSW) decrease as the load decreases, which provides excellent efficiency at light loads, and burst mode prevents audible noise. The MP183 can achieve below 3mW of no-load consumption under 265VAC, which is ideal for Internet of Things (IoT) applications, such as smart plugs and wall switches.”
Pages 13 through 15 of the datasheet goes into more detail about the operation of this device from start-up to UVLO, constant voltage operation, frequency / peak current foldback, and burst mode.
Hope this pointed you to the right direction.
Best,
Krishan