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In this lesson we're going to learn about the fast charge chip

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In Apple's mainboard, the fast charge chip is a charging voltage detection chip

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It has no charging function

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It mainly recognizes whether the charger voltage supports fast charging

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If it recognizes that the charger supports fast charging,

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it will notify the charging chip and make the charging chip enter the fast charging mode

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After the charging chip enters the fast charging mode,

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it will make the charging circuit produce large current,

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then realize the fast charging function

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Apple's models don't support fast charging until the iPhone 8 and up

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So from the iPhone 8 and above mainboards, we can find the fast charge chip

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After the fast charge is damaged, it will lead to slow charging,

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no charging, and sometimes it will lead to the error of brushing machine

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The replacement needs to be replaced with the same model

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On mainboards, common logos start with CG87 or CG88

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Next, let's get to know the fast charge chip in real life

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The mainboard is an iPhone 8p mainboard,

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and its fast charge chip is located above the hard drive

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This is the fast charge chip

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This mainboard is an iPhone XR mainboard,

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and its fast charge chip is in the lower left of the CPU

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This chip is the XR fast charging chip

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This mainboard is an iPhone 11 mainboard,

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and its fast charge chip is inside the shield

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With the top cover removed, this chip is the iPhone 11's fast charge chip

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So that's all for this lesson