一种白光LED电荷泵电路的设计  

The Design of White Light LED Charge Pump Circuit

作　　者：钱香[1] 李蕾蕾 QIAN Xiang;LI Leilei(Wuxi Vocational College of Science and Technology,Wuxi 214028,China)

机构地区：[1]无锡科技职业学院,江苏无锡214028

出　　处：《通信电源技术》2023年第24期25-28,共4页Telecom Power Technology

基　　金：江苏省高等学校哲学社会科学研究项目(2021SJA0952);江苏省职业教育教学改革研究课题“对接集成电路行业产业链“岗课赛证融通”育人模式研究-以高职集成电路技术专业为例”(ZYB674)。

摘　　要：白光发光二极管(Light-Emitting Diode,LED)具有体积小、功耗低、发光效率高及寿命长等优点,可以用作中小型便携式电子产品的背光源。设计了一种白光LED电荷泵电路,该电路可以根据实时的电源电压值选择电荷泵的增益模式,在1X/1.5X/2X这3种增益模式中依次切换,且输出电压恒定在设定值,为白光LED的稳定发光提供稳定的驱动电压。进行全电路仿真,结果表明,当电源电压从5.5 V逐渐下降到2.7 V时,输出电压都近似为4.5 V,驱动电流约为20 mA。Light Emitting Diode(LED)have the advantages of small size,low power consumption,high luminous efficiency,and long lifespan,and can be used as backlights for small and medium-sized portable electronic products.The article proposes a white light LED charge pump circuit that can select the gain mode of the charge pump based on real-time power supply voltage values.The circuit switches between the three gain modes of 1X/1.5X/2X,and the output remains constant at the set voltage value,providing a stable driving voltage for the stable emission of white light LEDs.Conduct full circuit simulation,and the results show that when the power supply voltage gradually decreases from 5.5 V to 2.7 V,the output voltage is approximately 4.5 V and the driving current is about 20 mA.

关 键 词：电荷泵 白光发光二极管(LED) 基准电压 驱动电路 

分 类 号：TM923.34[电气工程—电力电子与电力传动]