高精度数控直流稳压电源的设计与实现

摘要

基于单片机AT89S51设计了一种高精度数控直流稳压电源,数控部分采用12位高精度D/A转换器TLV5616控制稳压电路的输出电压；采用12位高精度A/D转换器TLC2543测量输出电压；采用矩阵式键盘作为电压的设定装置；采用LCD1602型液晶显示屏显示设定的电压和实际输出电压；电源以电压串联反馈式稳压电路为基础,并在系统中设计了过流保护电路.%The AT89S51 MCU-based high-precision and digital control DC stabilized power supply was designed. In digital control part, the 12-bit TLVS616 D/A converter regulates the voltage stabilizing circuit and thel2-bit TLC2543 D/A converter controls the output voltage; for the convenience of operation, the matrix keyboard was used as voltage setting device and the LCD 1602 was employed to display both setting voltage and actual output voltage; and regarding the power supply, the serial and feedback voltage circuit was based and o-ver-current protection circuit was designed.