Datasheet for the Texas Instruments bq24751A, a synchronous battery charge controller widely used in notebook charging circuits. The 1.98 MB PDF covers pinout, electrical characteristics and typical application circuits. Repair technicians use it to check the ACDET, ACOK and other control pins, confirm the expected voltages around the charger and judge whether the IC or its external MOSFETs have failed. Check the exact part marking on the chip, since related bq247xx variants differ in pin functions.
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