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BQ24773: ACDRV charge pump question

Part Number: BQ24773

Hi expert,

My customer has a question on ACDRV charge pump. As we know, we usually place a capacitor on bootstrap circuit in order to add a voltage difference on one voltage level. Since we don't need to put external capacitor for ACDRV charge pump, we want to know how it works internally. Could you kindly help on this question? Thanks a lot!!

Best regards,

Ann Lien