The utility model provides a liquid crystal display screen backlight driver, cold cathode fluorescent lamp backlight driver with switch power supply to form an integrated combination circuit for cold cathode fluorescent lamp driver LCD TV, LCD backlight. Thick film integrated circuit, including power transformer core, four tube equalizing output circuit, thyristor, semiconductor triode, diode, resistors, capacitors, connectors, common mode inductor, fuse, rectifier bridge. 220V AC after rectifying and filtering into 150V + DC, respectively supply switching power supply circuit with integrated circuit IC1, T1, T2 as the core of transformer core and cold cathode fluorescent lamp backlight with integrated circuit IC2 core, transformer T3, current circuit M as the core of the drive circuit was solved by the switching power supply low voltage (12V DC the problem of low efficiency of the power supply circuit) to cold cathode fluorescent lamp backlight driver. The utility model has the advantages of high power efficiency, small integral volume and light current balance.
【技术实现步骤摘要】
【技术保护点】
一种液晶显示屏一体化背光源驱动器,包括脉宽调制功率厚膜集成电路(IC1、IC2)、磁心变压器(T1、T2、T3)、冷阴极荧光灯均流电路(M)以及可控硅(Q1)半导体三极管(Q2)、半导体二极管(D0-D6)、电阻(R1-R28)、电容器(C1-C28)、连接器(J1-J6)、共模电感(LF)、保险丝(F1、F2)、整流桥(BD),其特征在于:220VAC经过整流桥(BD)整流和电容器(C5-C9)滤波,以及电阻(R1、R2)得到±150V直流电压,分别供给以集成电路(IC1)、磁心变压器(T1、T2)为核心的开关电源电路和以集成电路(IC2)、磁心变压器(T3)、均流电路(M)为核心的背光源驱动器电路,背光源驱动器电路、开关电源电路为一体化组合,所述的一体化电路连接为:电容器(C1、C2)串联后与电容器(C3)并联,其中一端与共模电感(LF)的1端连接,另一端与共模电感(LF)的3端连接,电容器(C1、C2)串联端与连接器(J1)的G端连接;保险丝(F1)一端与连接器(J1)的L端连接,另一端与共模电感(LF)的1端连接;连接器(J1)的N端与共模电感(LF)的3端连接;共模电感(LF ...
【技术特征摘要】
【专利技术属性】
技术研发人员:程进英,
申请(专利权)人:咸阳华立电子设备有限公司,
类型:实用新型
国别省市:61[中国|陕西]
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。