PCB Review - 200V Flyback Converter

Thread Starter

bigshrimp

Joined Apr 27, 2021
2
Hello,
I have a first draft of a 24VIN 200VOUT PCB and I would appreciate any feedback and suggestions, especially from anyone who has experience with switching power supply design. This is a two-layer board with a ground plane on the bottom layer.
Some things that I considered while laying out the board are:
  • Creepage and clearance
  • Minimizing area of switching loops
  • Keeping input and output current loops flowing in the same direction
  • Short traces
  • No ground plane past transformer
  • No ground plane under Rvout and Rdcm nodes to reduce capacitance
  • Keep feedback trace far from transformer

I have attached photos of the schematic and PCB Layers.
Thanks in advance.

Layer 1 (red) and layer 2 (blue)
layer12.png

Bottom Layer only
layer2.png

Top View
top3d.png

Bottom View
bottom3d.png


3D View
3d.png

Schematic
schematic.png
 
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