Simple silicon-controlled dimming LED driving power supply with high-PFC structure

一种简易高pfc架构可控硅调光led驱动电源

Abstract

The invention discloses a simple silicon-controlled dimming LED driving power supply with a high-PFC structure. The driving power supply comprises an input rectifier and filter circuit, a transformer, an output rectifier and filter circuit, a drive control IC, a starting circuit, a silicon-controlled detection circuit, a network compensation circuit, a linear voltage stabilizing circuit and a power switch tube, wherein the input rectifier and filter circuit, the transformer and the output rectifier and filter circuit are connected in sequence. The input rectifier and filter circuit is connected with the starting circuit. The starting circuit is connected with the drive control IC. The drive control IC controls the power switch tube. The power switch tube is connected with a primary coil of the transformer. An auxiliary coil of the transformer is connected with the linear voltage stabilizing circuit. The linear voltage stabilizing circuit is connected with the drive control IC. The silicon-controlled detection circuit is connected with the input rectifier and filter circuit and the network compensation circuit. The network compensation circuit is connected with the drive control IC. The simple silicon-controlled dimming LED driving power supply is simple in circuit, low in cost, good in dimming linearity, free of blinking and high in conversion efficiency and economic benefit.
本发明公开了一种简易高PFC架构可控硅调光LED驱动电源,包括依次连接的输入整流滤波电路、变压器、输出整流滤波电路,还包括驱动控制IC、启动电路、可控硅检测电路、网络补偿电路、线性稳压电路和功率开关管,所述输入整流滤波电路连接所述启动电路,所述启动电路连接所述驱动控制IC,所述驱动控制IC控制功率开关管,所述功率开关管连接变压器初级线圈,所述变压器辅助线圈连接线性稳压电路,所述线性稳压电路连接驱动控制IC,可控硅检测电路连接输入整流滤波电路和网络补偿电路,所述网络补偿电路连接驱动控制IC,本发明电路简单,成本低廉,调光线性度好,不会产生闪烁现象,具有很高的转换效率和经济效益。

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Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-104754832-AJuly 01, 2015昂宝电子(上海)有限公司Led驱动电路以及led灯具