CAJ | 학술논문

设计了一种基于ADP3806的高功率发光二极管（LED）的高效驱动电路。ADP3806是一款开关模式电源控制器，拥有双环路恒定电压和恒定电流控制、远程精确电流检测以及关断和可编程可同步开关频率，能提供恒定电流。同时在设计中利用单端原边电感转换器（SEPIC），其可以提供一种可以高于或低于输入电压的输出电压，在适当的占空比下工作，使连续传导模式（CCM）和脉冲宽度调制（PWM）控制变得简单，提高了效率，并且避免由变压器泄漏电感带来的电压尖峰和振铃。从而在需要进行升压和降压转换来同时驱动多个高功率LED的场合，这个设计是非常适合的。
설계료일충기우ADP3806적고공솔발광이겁관（LED）적고효구동전로。ADP3806시일관개관모식전원공제기，옹유쌍배로항정전압화항정전류공제、원정정학전류검측이급관단화가편정가동보개관빈솔，능제공항정전류。동시재설계중이용단단원변전감전환기（SEPIC），기가이제공일충가이고우혹저우수입전압적수출전압，재괄당적점공비하공작，사련속전도모식（CCM）화맥충관도조제（PWM）공제변득간단，제고료효솔，병차피면유변압기설루전감대래적전압첨봉화진령。종이재수요진행승압화강압전환래동시구동다개고공솔LED적장합，저개설계시비상괄합적。
An ADP3806-based high efficiency driving circuit for the high power light emitting diode(LED)was designed. ADP3806 is a switch mode power supply controller,which has double loop constant voltage and constant current control,long-range precision current detection,shutdown and programmable synchronous switching frequency,and can provide constant cur-rent. Meanwhile,SEPIC was used in design. Therefore,an output voltage being higher or lower than the input voltage can be provided by SEPIC. Under appropriate duty cycle,continuous conduction mode and the pulse width modulation control become easier,and the efficiency is improved. The voltage spikes and ringing caused by transformer leakage inductance can be avoided. The design is very suitable for the occasions that need to boost and buck conversion to drive multiple high-power LEDs simulta-neously.