20V to 300V DC-DC Boost Converter v.2.1 - copy

I can't recognise the topology. Is it a double boost boost converter? Also, what are the 47u, 100k, 300k and 22R components for? There is nearly 80V on the 47u capacitor, but what are you using it for?

Yep, topology is a single switch, two stage boost converter. The RC chains to which you're referring are passive dampening circuits for the LC circuits in the design. Otherwise, there's a spike in the frequency response of the LC filters, and the Q is high, which is not very desirable. Even with good feedback, the output doesn't stabilize quickly with high Q LC filters. The 300k/100k voltage divider is just to ,,bias,, that part of the circuit to which it's connected, as I designed the simulation to run from a high output level (workaround for a slow simulation). Biasing that part of the circuit with the voltage divider makes the simulation a bit more reliable

Here's an example of the LC damping I was talking about. The idea is to dampen the filter enough to not cause the circuit to misbehave, without introducing resistance in the DC path (series RL damping) - https://everycircuit.com/circuit/5207418520469504

I see