高效数控恒流电源摘要随着低碳经济时代的到来，提高能源利用率对工业和社会发展起着重要的作用。基于此本文描述了高效率数控恒流电源的设计原理和实现方法，本系统采用 DC/DC 变换器芯片 TPS5430，它是一款高效的电源开关控制芯片，输入电压范围宽，输出电流高达 3 Ａ。以 MSP430F247 单片机为主控制器，通过键盘来设置电源的输出电流，设置步进等级为 1mA，并可由液晶显示器显示实际输出电流值和负载功率。本系统还具有开路检测和过压保护功能，可广泛应用于需要高效恒流源的领域。关键词：MSP430F247 单片机 DC/DC 变换器 高效恒流源 AbstractThis paper describes the design of high-power LED power supply principle and method to MSP430F247 microcontroller-based controller, DC power through the keyboard to set the output current, set the step level as 1mA, and the actual output current value and load power can be displayed by the LCD . This system uses DC / DC converter chip TPS5430, the output power MOS tube can expansion the current . Single Chip Programmable output digital signal, through D / A converter (TLV5618) output analog, through the operational amplifier isolation amplifier, and precision voltage sampling resistor collection enlarged compared to control DC / DC converter's feedback side, to achieve the output current control. Output current through the current / voltage changes, the adoption of A / D converter chip, real-time into the analog data, and then analyzed by microcomputer processing, the feedback through the form of data links, so that current is more stable, it constitutes a stable voltage-controlled current source. Actual test results show that the system output current stability, with the load and ambient temperature changes and high Jing Du, output current error of ± 5mA, output current at 20mA ~ 2000mA Fan Wei can be arbitrarily set within, output efficiency up to 90 %...
