Main power circuit of Antminer APW12 1215 power supply

In the powering process of Antminer APW12 power supply, the output voltage of the second auxiliary power will supply power to the U13 regulator and Q3 triode. The output voltage of U13 will be used to power the CPU chip, and the output voltage of Q3 will be used to power the main power chip. The main power circuit of APW12 will work only when the CPU chip and the main power chip are powered normally.

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