Combination of single chip microcom

Combination of single chip microcomputer and dedicated PWM chip for switching power supply. This solution uses a single chip microcomputer to extend the A / D converter, continuously detect the output voltage of the power supply, and output the output of the D / A converter according to the difference between the output voltage and the set value of the power supply It regulates, controls the PWM chip, and indirectly controls the power supply. In this way, a single-chip microcomputer was added to the feedback loop of the power supply, and instead of the original comparative amplification link, the program on the single-chip microcomputer must use a more complex PID algorithm.