If PG is left unconnected, you lose the ability to monitor or sequence downstream loads.
Fix: Connect PG to an MCU input or use it to enable a second regulator.
Once the primary is running, move to secondary side diodes (D201, D202).
Using thin traces for power ground instead of a solid plane increases ripple and can trigger OCP falsely.
Fix: Use a dedicated ground polygon on the schematic and PCB.
Even experienced designers make mistakes. Below are the top 5 errors observed in real-world PCBA debugging.
There is always a small electrolytic capacitor near the PWM IC. This stores the charge to run the IC after startup.