Rogers D391A 场致发光(EL)灯驱动方案

Rogers公司的D391A是高度集成的场致发光(EL)灯驱动器,它是基于Rogers公司的专利三端口技术,提供内置的EMI屏蔽,同时具有大功率和高效率,和外接时钟兼容和输出过压保护,主要用在DFLXTM EL键盘灯,蜂窝手机和手持机,PDA,单色LCD和遥控等.本文介绍了D391A的主要特性,方框图以及标准测试电路和D391A EL驱动器配置参考图如3.0V手持机 DFLX键盘, 3.3V手持机 DFLX键盘和3.0V手持机LCD配置图.此外还介绍了D391A驱动多个EL灯电路图, 两级调光电路图和通过高频时钟PWM的EL亮度控制图.

D391A Electroluminescent Lamp Driver IC

Rogers DUREL® D391A driver is part of a family of highly integrated EL drivers based on Rogers’ patented three-port (3P) topology, which offers builtin EMI shielding. This high-performance device uses a proprietary circuit design to produce a low-noise wave shape for low-noise performance in applications that are sensitive to audible and electrical noise.

D391A主要特性:

• New Patented Low Noise Wave Shape

• Output Over Voltage Protection

• High Power and Efficiency

• External Clock Compatible

• High Performance With Low-profile Coils

• Lead-Free (Pb-free) and Green MSOP /DFN Packages

D391A应用:

DFLXTM EL Keypad Lamps

Cellular Phones and Handsets

Data Organizers/PDAs

Monochrome LCDs

Remote Controls

图1.D391A驱动器方框图

图2.D391A标准测试电路

D391A EL驱动器配置参考图

Reference D391A EL Driver Configurations:

图3.3.0V手持机 DFLX键盘配置图

图4.3.3V手持机 DFLX键盘配置图

图5.3.0V手持机LCD配置图

图6.D391A驱动多个EL灯电路图

图7.D391A两级调光电路图


图8.采用外接时钟信号的灯频率控制图

图9.通过高频时钟PWM的EL亮度控制图