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In this lesson we will look at the summary of the power supply required after the 100 series mainboard is triggered

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The first one is VDDQ

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VDDQ is the main memory power supply, it is used to power the memory and CPU

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VDDQ is generally generated by PWM circuits, and its voltage is generally 1.2V

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If DDR3 memory is used, its voltage may be 1.35V or 1.5V

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1.35V is DDR3L, 1.5V is DDR3

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Further down, VPP power supply

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VPP power supply is also one of the power supply of memory

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It is generally only used to supply power to memory,

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and VPP power supply is generally generated by PWM,

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only a small number of mainboards will use LDO to generate power

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Further down, VTT power supply

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VTT power supply is also power supply to the memory, and it only supplies power to the memory

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It is generally generated by an LDO circuit

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And the voltage of VTT is generally half of VDDQ

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If VDDQ is 1.2V, then VTT is 0.6V

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VCCPLL_OC

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This power supply is for the CPU

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And it is generally connected to VDDQ, directly powered by VDDQ to the VCCPLL_OC pin of the CPU

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VCCIO

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it is bus power supply

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This VCCIO is only used to power the CPU

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Its voltage is generally 0.95V or 1.05V

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The way it is generated may be PWM or LDO

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But in more cases, the VCCIO power supply is generated by the memory main power supply

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VDDQ through the operational amplifier and MOS circuit.

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Further down, VCCST

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It is called the maintenance voltage, and it is also used to supply power to the CPU.

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Its voltage is 1V

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Its generating circuit may be an LDO, or it may be an op amp plus a MOS

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VCCPLL

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The VCCPLL of the general mainboard is connected to VCCST, and they share a power supply

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VCCSA

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It is the system management power supply

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Generally, it is generated by PWM circuit

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And VCCSA, VCCCORE and VCCGT are jointly controlled by the CPU power supply chip

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But there are also a small number of mainboards, VCCSA and VCCIO are connected together

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VCCCORE

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It powers the core of the CPU

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Its voltage is indeterminate and will be regulated by SVID

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Generally, it is about 0.8V to 1.1V when it is just turned on.

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And VCCCORE core power supply is generally multi-channel power supply

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We see a circle of inductors around the CPU socket, most of which are powered by the CPU core

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Further down, VCCGT

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It is integrated power supply

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It is the same as the core power supply, the voltage is also regulated by SVID

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And it is generally multi-phase power supply

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The circle of inductance around the CPU seat is mainly the CPU core power supply

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and the CPU integrated display power supply.

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CPU integrated display power supply generally occupies one to two phases of power supply,

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and the rest is CPU core power supply

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Ok, the above is the power supply required by the 100 series mainboard after triggering