Design of intelligent power supply based on cortex-M3

In this paper, a NC stabilized power based on STM32F103VCT6 is designed. The power outputs the analog quantity through the D/A converter in the output of microprocessor. Then it is isolated and amplified by an operational amplifier, and controls the base of the output power tube. Different voltage is output as the base voltage of the power tube varies. The output voltage controlled by the keyboard can realize the stepping of 0.1V, and the value of voltage output is displayed by LCD in real time. In the implementation procedure, the functions like error correction, fault self-diagnosis, over-current and overvoltage protection are also taken into consideration, which is much more practical. The actual test result shows that the power is adjustable and practical in actual application with wide output range, small ripple and strong anti-interference ability.