基于STC12LE5201AD单片机的LED闪光灯电源设计  

Design of LED Flash Power Supply Based on STC12LE5201AD Single-Chip Microcomputer

作　　者：张锋[1] 谈敏[1] ZHANG Feng;TAN Min(不详)

机构地区：[1]江阴职业技术学院电子信息工程系,江苏江阴214405

出　　处：《科技创新与应用》2021年第10期33-37,共5页Technology Innovation and Application

基　　金：2019江苏省高校哲学社会科学研究项目立项课题的阶段性研究成果(编号:2019SJA0878,主持人:丁雷);2019江苏省高等教育教改研究立项课题的阶段性研究成果(编号:2019JSJG478,主持人:丁雷)。

摘　　要：文章以STC12LE5201AD单片机作为控制核心,完成LED闪光灯电源的设计。系统主要由开关型升压电路模块、恒流源电路模块、按键控制模块、显示模块以及报警提示模块组成。升压部分采用XL6009升压芯片,通过调节滑动变阻器,将3V输入电压升高为12V给恒流源和控制电路供电。通过采样电流、电压值,单片机输出电压控制场效应管恒流、稳压输出。实验表明,该变换器能将电池电能转化为恒流输出、同时实现连续和脉冲两种输出模式、电流档位的选择、输出电压限压保护和过载报警功能。系统输出相对误差小,效率高,能够满足恒流稳压电源的要求。In this paper,STC12LE5201AD microcontroller is used as the control core to complete the design of LED flash power supply.The system is mainly composed of switch boost circuit module,constant current source circuit module,key control module,display module,and alarm module.The step-up part adopts XL6009 step-up chip.By adjusting the sliding rheostat,the 3V input voltage is increased to 12V to supply power to the constant current source and control circuit.Through sampling current and voltage value,it is found that MCU output voltage control field effect transistor(FET)realized constant current and stable voltage output.The experimental results show that the converter can convert the battery energy into constant current output,realize two output modes of continuous and pulse,select the current gear,protect the output voltage and limit the voltage,and alarm the overload.The relative error of the system output is small and the efficiency is high,which can meet the requirements of constant current and stable voltage of power supply.

关 键 词：STC12LE5201AD XL6009 恒流 稳压 

分 类 号：TM923[电气工程—电力电子与电力传动]