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TPS55340: LCD flickering

Part Number: TPS55340


Hi, 

I have used TPS55340PWP for providing LCD back light i.e; 12V DC , 1A and the input voltage is 5V. I had already implemented this design earlier for the same LCD and it worked and next time the only change i did was I replaced IHLP4040DZER6R8M01 part inductor with IHLP2525CZER6R8M01 part this is the only change I made i my new board.

Now in my new board when I connect the LCD it starts to flicker please suggest how to solve it?

Regards,

Karthik