Abstract: A medium-power boost switching power supply is designed based on PWM technology and AD-type single-chip microcomputer. The power supply mainly consists of a single-chip microcomputer control module, a DC-DC conversion module and a display keyboard module. The single-chip microcomputer samples the voltage and current of the DC-DC conversion module, and realizes closed-loop control of the switching power supply through PWM modulation signals. It also has the functions of overcurrent detection, protection and alarm. Keywords: AD-type single-chip microcomputer; DC-DC conversion; PWM modulation
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