一种新型高效LED背光源驱动控制电路设计  

A new highly efficient LED backlight drive control circuit

作　　者：张培[1] 

机构地区：[1]苏州市职业大学电子信息工程学院,江苏苏州215104

出　　处：《电源技术》2013年第10期1867-1869,共3页Chinese Journal of Power Sources

基　　金：江苏省自然科学基金资助项目(B K 2009131);苏州市科技计划项目(S G Z2011011)

摘　　要：用单片开关电源芯片做主控芯片,用分立元件搭建发光二极管(LE D)背光驱动控制电路,设计了一种LE D背光源驱动控制电路。该电路由电压转换、电压反馈、背光调整和恒流控制四部分组成。电路简洁,易于实现,在保证LE D驱动电路性能的同时,简化了驱动电路设计,降低了电路的整体成本。经测试,所设计的LE D驱动电路效率高,且能够精确灵活地调整LE D背光电流。A kind of LED backlight driver circuit using an integrated switching power supply chip was designed. The backlight control and adjustment department consisted of discrete components. The whole circuit was composed of voltage converter circuit, voltage feedback circuit, backlight adjustment circuit and constant current control circuit. This circuit was simple and easy to implement,and at the same time, the performance was guaranteed. The design was simplified and the overall cost of the circuit was reduced. The adjustment of the LED backlight current was accurate and flexible and high efficiency was obtained after test.

关 键 词：开关电源 分立元件 电压转换 电压反馈 背光调整 恒流控制 LED驱动电路 

分 类 号：TM564[电气工程—电器]