This paper discusses the application of the single chip microcomputer control system applied in switching power supply method and principle, put forward switching power supply adjustable voltage regulator output point of view. That can realize switching power supply control regulation, and through the analysis of the working principle of voltage, voltage regulation method, A/D chip and the principle, so that the output voltage to achieve 0.1 ~ 15V step regulator. Finally draw the conclusion that the DC switching power supply under the control of single-chip microcomputer can output stable, adjustable DC voltage to the conclusion.

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05-数控开关完整（程序好）

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