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Today let's learn about the power supply principle of Apple mainboard

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First, let's take a look at the power supply distribution of the mainboard

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The power distribution of the mainboard usually adopts the principle of proximity

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For example, the circuit that provides power to the CPU is generally close to the CPU

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The circuit that provides power to the independent graphics card, usually close to the independent graphics card

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For example, this is an independent graphics card, next to its core power supply

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This inductor provides a 1.1V voltage for the independent graphics card

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and the memory power that powers these memory

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For example, the charging inductor is close to the battery interface

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There's a solid state drive next to it

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The power supply for the hard drive is on the back of the mainboard

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Here is the 5V power supply,

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here is the 3.3V power supply, and the 5V S4 voltage

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Next to the CPU, there is the core power supply of the CPU and the core display power supply,

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which are for the CPU

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In the mainboard, these large inductors,

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each inductor represents a PWM power supply output,

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and the ground value of each power supply is different

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For example, for the inductors that supply power to the independent graphics card and CPU,

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because the power consumption of the CPU and the independent graphics card is relatively large,

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the ground value of these inductors is relatively low

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The following VCCIO bus power supply, 1V power supply, memory power supply, etc.,

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the ground value of these power supplies is relatively high

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OK, this is the power supply distribution on the mainboard