基于双同步斩波模式的LED声控灯驱动电源设计

提出了基于双同步斩波模式的微功耗LED声控灯驱动电源设计方法。该驱动电源用一个单片机控制两个开关管分别为主电源和待机电源提供工作电流。主电源采用全波斩波工作模式为LED灯组提供工作电流;待机电源采用半波斩波工作模式,从而大幅降低了待机功耗。该驱动电源结构简单,可在50~60 Hz频率的180~250 V的宽电压范围内工作,具有恒流驱动功能和微功耗特性,且稳定可靠和较高的性价比。

Design of a Micro-power LED Sound Lights Drive Power Based on the Dual Synchronous Chopper Mode

A method to design a micro power LED sound lights drive power supply based on the dual synchronous chopper mode is proposed.This drive power supply controls two switches to provide operating current for the main power and the standby power with a SCM.The main power supply with the full wave chopping mode provides operating current for the LED lamps;because the standby power uses the half wave chopper mode,the power consumption is greatly reduced.The structure of the power supply is simple,and can work within 180~250 V at 50~60 Hz.The power supply has the function of constant current driving and the characteristic of micro power.Moreover,the power supply is stable and reliable with good performance and low cost.