动态光调节下的数字式LED驱动电源嵌入式设计  

Embedded design of digital LED driving power supply under dynamic light control

作　　者：蔡建军[1] CAI Jianjun(Wuxi Institute of Technology,Wuxi 214121,China)

机构地区：[1]无锡职业技术学院,江苏无锡214121

出　　处：《现代电子技术》2017年第10期103-106,110,共5页Modern Electronics Technique

基　　金：国家自然科学基金(77101675)

摘　　要：由于动态光调节下的数字式LED驱动电源设计不完善,使动态光对LED的调节无法达到预期效果,而嵌入式系统则可有效提升LED驱动电源各项性能。为此,设计基于嵌入式系统的动态光调节下数字式LED驱动电源。其中的A/D采集模块对动态光调节下的数字式LED数据进行采集、整流、滤波和A/D转换,得到A/D采样数据并传输到驱动电路。驱动电路采用嵌入式设计对A/D采样数据进行优化,进而实现对LED发光的合理控制和动态光对数字式LED的有效调节。C8051F021芯片是基于嵌入式系统的动态光调节下数字式LED驱动电源的"管理者",其管理流程图于软件中给出。软件还对A/D采集模块的数据采集语言进行了设计。实验结果表明,所设计的数字式LED驱动电源驱动性能强、电源转换效率高。The adjustment of LED controlled by dynamic light can′t achieve the expected effect due to the imperfect designof digital LED driving power supply adjusted by dynamic light,but the embedded system can improve the performances of LEDdriving power supply effectively.An embedded system based digital LED driving power supply controlled by dynamic light wasdesigned.The A/D acquisition module performs the acquisition,rectification,filtering and A/D conversion of data of digital LEDadjusted by dynamic light to get the A/D sampling data,and transfer it to the driving circuit.The embedded design is adoptedin the driving circuit to optimize the A/D sampling data,so as to control the LED lighting reasonably and regulate the digitalLED with dynamic light effectively.The C8051F021chip is the"manager"of the embedded system based digital LED drivingpower supply under dynamic light control.Its management flow chart is given in the third part of this paper.The data acquisitionlanguage of A/D acquisition module was design also in the third part.The experimental results show that the designed digitalLED driving power supply has strong driving performance and high power conversion efficiency.

关 键 词：动态光调节 数字式LED驱动电源 嵌入式设计 C8051F021 

分 类 号：TN86-34[电子电信—信息与通信工程] TP303.3[自动化与计算机技术—计算机系统结构]