8733a is a power chip
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Rf chip: SYN115
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wifi module: Hi1131
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Switching regulator: TLV62568
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Lithium battery management chip: XT4066
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Coulometer chip: AXP2601
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Human body sensing: PY0576
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Power amplifier: 8733A
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Power chip: TPS70628
Class k audio amplifier mobile phone chip.