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HY3030E power supply cc cv circuit

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amg16

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Hi,
I've been trying to understand the current and the voltage control of this power supply but i got kinda lost :bang:, could someone give me his understanding to this circuit?
Thanks!:thumbsup:
cc cv.png
 

The schematic has many components. It's not easy to follow the flow of control. Some components are probably for stress-sharing or 'safety' components.

Some of the adjusting networks could consist of multiple components. Perhaps the purpose is convenience, or stability, etc. However it might be possible to build these networks with fewer components. We'll have trouble figuring it out, until we redraw the circuit for simplicity.
 

it would be interesting to see the LHS too..then we could see to where the controller FB pin is connected. It looks like a two transistor forward but I expect you knew that.
I am looking for the feedback path to the controller but cant see it.
 

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