Research And Application Of Digital Switching Power Supply Based On TMS320F28335

Power supply of the electronic devices provides energy for the entire electronic device, which is the "heart" of the electronic device. Power has been widely applied to communications, computers, automation, military, industrial, agriculture and other fields with the development of the supply from the linear power supply to the switching power supply. The digital switching power supply has simplified the hardware circuitry. It has overcome the drift problem of the analog power supply, easy to implement advanced control and has become a power in the field of application of hot spots.This Master Thesis studies a digital switching power supply based on DSP chip TMS320F28335. The switching power is small in volume and can output stable voltage. The main work is as follows:1. It analyzes the working principle of digital control of switching power supply system, and makes the choice of the topology of the main circuit for power supply according to the study of the basic working principle and main circuit topology structure of the switching power supply.2. This Master Thesis designs the main circuit and peripheral circuit, and determines the main circuit components of each part through analysis and calculation in the meantime. According to the design demand of the subject.3. It has designed the peripheral circuit of DSP chip TMS320F28335, the software flow and the algorithm.4. It builds a finally digital switching power supply of DC boost type, and carries on the relevant test. It has proposed the characteristics of the digital switching power supply system, the existing problems, and pointed out the direction of further improvement.