What power topology is this power circuit?

Knight97538

What power topology is this power circuit? [Copy link]

What is the power topology of this power circuit? Which teacher can explain the working process of this circuit?

maychang

[What power topology is this power circuit? ]

There is more than one switching power supply in the picture, so it is impossible to say what topology this power supply circuit is.

maychang

This picture is terrible. It took me a long time to recognize that the red box is a diode.

Have all schools cancelled drawing classes now?

maychang

Also, what does this solid line frame (which I have colored red) mean? It is obviously not a wire. What is it?

maychang

The connection method of TL431 in the red box in the figure is wrong. Due to the existence of capacitor C22, TL431 cannot work at all because there is no DC path.

There are other errors, which I will not point out one by one.

led2015

It does look complicated, and it is a bit difficult to tell which of the 11 power topologies it is.

maychang

led2015 posted on 2023-8-17 23:34 It does look complicated, and it is a bit difficult to tell which of the 11 power supply topologies it is

It's not complicated at all.

There are two switching power supplies in the picture. The two switching power supplies have different topologies, so it is impossible to say which topology this power supply circuit is. It is easy to talk about the two switching power supplies separately.

hjl0903

Single-tube forward power supply with PFC correction, output is self-driven synchronous rectification