一种新颖低成本程控直流电源设计方案

宽范围、高分辨率、大功率输出一直是程控电源设计中的难点. 借助高分辨率数模转换器间接调节开关型稳压电路,同时通过反馈电路利用高分辨率模数转换器监测输出电压的大小,实现了一个闭环的程控宽范围、高分辨率和大功率的直流电源. 以STM32为测量控制核心,利用其片内12 bit数模转换器及模数转换器,控制廉价的开关型电压调节器LM2596S,实现了一个程控高分辨率、宽范围和大功率的低成本直流电源. 该电路设计方案具有体积小、输出稳定、使用方便等优点.

A Novel and Inexpensive Programmable DC Power Design

Wide range,high resolution and high power output are difficulties of a programming power design. A scheme is designed by means of high-resolution digital-analog converter to adjust the switching regulator circuit,while the feedback circuit makes use of high-resolution analog-digital converter to monitors the size of the output voltage indirectly,thus achieving a closed loop programmable high-resolution wide range,high-power DC power. The scheme uses the STM32 as a control core,and uses its on-chip 12 bit digital-analog converter and analog-digital converter and low-voltage switching regulator LM2596S specifically to achieve a high-resolution wide-range programmable high-power and inexpensive DC power. The circuit design has the advantages of small size,stable output,easiness to use and so on.