基于NCP3065的LED升压驱动电路设计  

Design of LED Boost Driver Circuit Based on NCP3065

作　　者：黄剑平[1] 沈汉鑫[1] 

机构地区：[1]厦门理工学院光电与通信工程学院,福建厦门361024

出　　处：《电子器件》2014年第2期245-248,共4页Chinese Journal of Electron Devices

基　　金：福建省科技厅科学计划项目(2012J01238);厦门理工科研基金项目(XKJJ201103)

摘　　要：高效稳定的恒流驱动电路是LED照明工程设计的关键之一。应用新型驱动器件NCP3065设计了一款LED升压恒流驱动电路。介绍了电路的工作原理和元件参数的详细计算过程。所设计电路包含DC-DC升压驱动部分和PWM调光部分,可以驱动5个1 W串联的LED,驱动电压达16 V,电流达350 mA。实测结果表明,电路整体效率高达87.5%,并且具有调光线性度好,性能稳定、可靠等优点,适用于各种大功率LED的照明应用。An effective and stable constant current driving circuit is one of the keys of LED lighting design. A boost circuit used NCP3065 chip is designed. The principle how to work the circuit and detail the calculation process of the elements＇ parameters is introduced. The circuit includes a DC- DC boost driving part and a PWM dimming part. The circuit can drive five 1 W LEDs connected in series,and its driving voltage is 16 V,driving current 350 mA. The test result shows that the efficiency of the circuit is 87. 5%,good linearity and stable,suitable for high power LED lighting applications.

关 键 词：LED照明 恒流 升压驱动 PWM调光 

分 类 号：TN432[电子电信—微电子学与固体电子学]