Abstract
New switching power supply gradually replaced the traditional linear power supply, but rarely has the operational status monitoring function. The design includes the main power supply and monitoring circuit design. The main circuit topology of the power supply is flyback DC-DC conversion body. The selection of the control circuit is current-controlled PWM chip. The monitoring circuit includes the design of detection and display circuit. The voltage and the current are detected respectively with the aid of the resistive subdivision in the testing circuit. The display circuit adopts PIC for sampling signal processing, and the dot matrix LCD12864 is used to display this power operating parameters. The power supply control system is simulated in Saber and Proteus software which monitors and observes the various parts of the circuit voltage and the output waveform. Finally, the hardware circuit is built and tested to prove the designed digital intelligent power feasibility.
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