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In this lesson, we're going to learn the ACC power supply chips

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In Apple models,

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the ACC power supply chip is mainly used to convert the battery power

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into the operating voltage of the USB device

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For example, the mobile phone has the charge function

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When my mobile phone is out of power,

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after connecting the charger line,

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your mobile phone can charge my mobile phone

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The power supply received by my mobile phone is converted from ACC power supply by USB chip

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In early models, the ACC was powered by the mains,

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and the phone charged slowly during charging

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From iPhone xs models, there will be a separate ACC-powered chip

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With a separate ACC powered chip, the phone will charge faster

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For example, in the summer,

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we insert a small fan in the tail socket of the mobile phone,

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the fan can turn

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The power supply of this fan is output to the fan after the ACC power supply is converted by the USB chip

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With ACC power chip, the fan speed is faster

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Without ACC power chip, its speed will be relatively small

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Because in the early model, the power supply of ACC was output by the power supply,

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and the power was relatively small

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The ACC chip will only be available on models from the iPhone xs

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The chip has a black, square surface

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It is not easy for us to identify in real objects,

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so we need to use the circuit diagarm or the component map to identify

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After it is damaged, it will lead to no connection,

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no charging and other faults

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When repairing, we need the same model to replace

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Let's go to the physical mainboard to know the ACC power supply chip

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This mainboard is a XR mainboard,

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and its ACC power chip is on the Wifi

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This chip is the ACC power supply chip of XR

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The mainboard is a xr Max mainboard,

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and its ACC powered chip is inside the shield

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After we remove the shield,

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this chip is the ACC power chip

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This mainboard is the mainboard of iPhone 11,

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and its ACC powered chip is located on the reverse side of the upper layer

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This chip is the ACC power supply chip of 11

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So that's it for this lesson