TFT-LCD驱动芯片内置电源产生模块设计  

Design of a Built-in Power Supply Block in Driver IC for TFT-LCD Panels

作　　者：李丹[1] 魏廷存[1] 张萌[1] 高武[1] 

机构地区：[1]西北工业大学航空微电子中心,陕西西安710072

出　　处：《微电子学》2006年第3期307-311,共5页Microelectronics

基　　金：陕西省2004年科学技术研究发展计划资助项目(2004K05-G3);2005年度国家高技术研究发展(863)计划资助项目(2005AA121193)

摘　　要：从中小屏幕TFT-LCD的显示和驱动原理出发,设计了一种用于TFT-LCD驱动IC的内置电源产生模块。该模块为芯片中各个数字和模拟子系统提供基准电压、偏置电压、工作电压和TFT-LCD的驱动电压。针对芯片各模块的负载和对供电电压的不同要求,提出了一种以带隙基准电路为核心,由LDO电路、电荷泵电路等组成的电源模块的系统解决方案。通过0.25μmCMOS高压工艺的HSPICE仿真及工程样片流片验证,证明此设计能够满足TFT-LCD驱动芯片的性能指标要求。A built-in power supply block for TFT-LCD driver IC is designed based on the display and driving principle of medium- and small sized TFT-LCD panels. It supplies reference voltage, bias voltage and operation voltages for digital and analog blocks on the chip, and also provides driving voltages for TFT-LCD panels. Based on the requirements of different blocks for load abilities and power supply voltages, a total solution of built-in power supply block is proposed, which is implemented by bandgap reference, LDO and charge-pump DC-DC converter. Both circuit simulation and a prototype chip using 0.25μm CMOS high-voltage process demonstrates that this design can meet the specifications and performance requirements of TFT-LCD driver IC.

关 键 词：TFT—LCD 驱动IC 内置电源 DC—DC变换器 带隙基准 LDO 电荷泵 

分 类 号：TN402[电子电信—微电子学与固体电子学]