"基于单片机的数字化直流稳压电源设计研究——毕业设计论文"

Direct current regulated power supply is one of the commonly used equipment in electronic technology and is widely used in teaching and research fields. Traditional Dc regulated power supplies are almost always adjusted by rotary switches, with low adjustment accuracy, difficult control, large volume, complex structure, and frequent jumps, making them cumbersome to use. By integrating single-chip digital control technology into the design of DC regulated power supplies, the designed digital DC regulated power supply features digital display, digital input voltage adjustment, and high voltage regulation accuracy. Moreover, through software programming, it is easy to achieve function extension. The current development of digital power supplies mainly focuses on higher digital control accuracy and resolution, better dynamic characteristics, better environmental performance, intelligence and high reliability, and broader application directions. This design uses AT89S51 as the main control chip, controls the output voltage of the digital-to-analog conversion module DAC0832, and amplifies the output through operational amplifier OPA552. Four buttons are set to increase or decrease the voltage, and a digital display module is included. It can achieve an accuracy of 0.1V per step, with an output voltage range of 0-15V, and a current of up to 200mA. Keywords: digital power supply; AT89S51; DAC0832; OPA552 Overall, the design and implementation of the digital DC regulated power supply using single-chip technology provides a more precise, controllable, and user-friendly alternative to traditional power supplies. It meets the current trends in digital power supply development and offers potential for further advancements in terms of control accuracy, resolution, environmental performance, intelligence, and reliability.