I have designed 60W driver (output current 1.5A) using LNK420EG.
I take reference of RDR-290 and Application Note AN49.
I have designed it for universal input volate range : 85VAC to 265VAC. But i am facing weird issue.
At around 90VAC to 180VAC load current is increased upto 2A and after 180VAC to 240VAC it got down to 1.2A.
Please find attached desing of 60W driver.
Can you please suggest any solution?
I have executed following experiments:
1. R1 and R2 value changed as per reference (R1-4M, R2-1.4M)
2. C6 value changed to 10uF
3. I have tried 0.1uF cap between V and S pin but it didn't worked.
Looking forward for proper solution.
Thanks & Regards,