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LP8861-Q1: LP8861-Q1 failure analysis

Part Number: LP8861-Q1

Dears

There is a failing samples in my electrical endurance experience , could you help to analysis my schematic.

After my preliminary analysis LP8861 peripheral components DMP3099L and B360B were not damaged ,peripheral resistence capacitor also no damage.

It was found that the voltage output of the failure part LP8861 SD pin pin was abnormal, and the voltage the normal voltage of DMP3099L G electorde was 6V,but now it's 12V.

Attenched is my shematic ,pls help to check.Many Thanks

1.LP8861-Q1 Schematic

1.Extend LED lamp string diagram

3.Lamp string electrical parameters