中文摘要：

为解决大功率LED照明中因电解电容导致的驱动电源与LED的长寿命不匹配这一问题,提出了采用有源纹波补偿电路取代传统驱动电源中电解电容的方案.首先,选用带斜坡补偿的、峰值电流控制的Buck型电路作为主电路,建立了峰值电流控制模式下电流环的传递函数;然后,通过幅频特性和相频特性分析,得到了不同程度斜坡补偿下的电流环稳定情况.最后,设计了峰值电流模式控制的有源纹波补偿Buck型LED驱动电源的原型电路.仿真和实验结果证实了此电路的正确性和可靠性.

英文摘要：

In order to overcome the mismatching of the short lifespan of electrolytic capacitor in power supply to the long lifespan of high-power LED,an active ripple compensation circuit was proposed as the replacement of the traditional electrolytic capacitor filter.In the investigation,first,a Buck converter with slope compensation in peak current control mode was chosen as the main circuit and the corresponding current-loop transfer function was established.Next,the current loop stability with different slope compensations was discussed by analyzing the amplitude-frequency and the phase-frequency responses.Then,a prototype circuit of the LED Buck power supply with active ripple compensation in peak current control mode was designed.Finally,simulations and experiments were carried out to verify the correctness and reliability of the proposed circuit topology.