恒定输入/输出功率的LED驱动电源

LED Drive Power Supply with Constant Input/Output Power

文章从理论上分析了传统的准谐振模式Buck-Boost LED驱动电源不能良好地实现恒定功率输入输出,即输入输出功率的线性调整率较差。在此基础上提出了线电压补偿方式,即通过线电压补偿网络,可以有效改善输入输出功率的线性调整率,实现LED驱动电源的恒功率输入输出。从公式推导和理论分析证明了线电压补偿方式的可行性,并通过实验验证。

In this paper,we theoretically analyzed the traditional quasi resonant mode Buck-Boost LED drive power,which cannot achieve constant power input and output well.The linear adjustment rate of input and output power was poor.On this basis,a line voltage compensation mode（through line voltage compensation network）was proposed,which can effectively improve the linear adjustment rate of input and output power,and achieve constant power input and output of LED drive power.From the formula deduction and theoretical analysis,the feasibility of the line voltage compensation method was proved and verified by the experiment.