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In this video we're going to learn about the charging chips

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In the iPhone mainboard,

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the main function of the charging chip is to convert the power supply of the data line

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into the voltage of the battery to charge the battery

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In addition to the charging function inside the charging chip,

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it also detects the voltage of the battery and the charging current

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If the battery overheats for a long time,

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the charging chip also has the function of overtemperature protection

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In addition to the above functions,

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the charging chip also has a special function

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It is to convert the battery power supply into the main power supply,

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to provide operating voltage for other chips on the mainboard

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After the charging chip is damaged,

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the common fault is not charging, or charging slowly

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In some models,

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a damaged charging chip can even cause the device to turn on automatically

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The chip needs to be replaced with the same model

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In the iPhone, many of the charging chips are of the same model

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In the mainboard,

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the charging chip is generally located near the battery interface,

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there will be a large inductor next to it

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The charging chip surface is black

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The model number usually starts with SN24 or SN26

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Let's go to the physical mainboard to look at the charging chip

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This is the iPhone 7 mainboard,

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and its charging chip is located on the bottom of the mainboard

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That chip is the charging chip in the iPhone 7

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This is the mainboard of the iPhone 8p,

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and its charging chip is also located underneath the mainboard

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This chip is the charging chip in the iPhone 8P

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This mainboard is an XR mainboard,

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and its charging chip is also located under the mainboard

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It's bigger than the iPhone 8 charging chip

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This is the xs mainboard,

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and its charging chip is located near the cpu of the upper mainboard

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This chip is the charging chip for the xs

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This is the mainboard of 11

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The charging chip of the two-layered mainboard is usually located in the upper mainboard

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The charging chip of the 11 is located below the power supply

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This chip is the charging chip of 11

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So that's all for this lesson