8681l Ic Datasheet

: The 8681L may not be outputting gate drive signals to the charging MOSFETs, or its AC-detect circuitry has failed.

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: Ensure sufficient decoupling capacitors are used as per the 8681L datasheet recommendations; lack of these can lead to high failure rates in some projects. : The 8681L may not be outputting gate

If the 8681L has an EN pin and you leave it floating, the internal state is undefined. The device may remain off or oscillate. Always tie EN to VIN or a logic high. or its AC-detect circuitry has failed.