应用于AMOLED显示驱动的低纹波电荷泵设计  

Design of a low ripple Voltage Charge Pump for AMOLED Display Driver

作　　者：付秀兰[1] 庞遵林[1] 贾晨[1] 

机构地区：[1]中国电子科技集团第38研究所,安徽合肥230088

出　　处：《中国集成电路》2015年第7期37-40,48,共5页China lntegrated Circuit

摘　　要：基于0.162μm高低压混合CMOS工艺,实现了一种低纹波的升压型电荷泵。文中从系统的角度,阐述了适用于OLED显示驱动芯片的电荷泵的架构,详细介绍了第一级倍压电荷泵电路。该电路采用对称结构的泵电路实现低纹波,并通过反馈电路实现输出电压的稳定。仿真结果表明,当输入电压为3.4V,负载电流为在25 mA时,纹波电压仅有40mV,电源效率可以达到90%。Based on 0.162μ m mixture voltage CMOS technology, alow ripple voltage charge pump is realized. In this paper, a charge pump system which is suitable for AMOLED display driver IC was adopted, illustrates the working principle of first low ripple voltage charge pump. The pump gets low ripple and constant output voltage with a symmetrical pump circuit, feedback loops. Simulation results show that the ripple voltage less than 80 mV, the average efficiency is 80% when load changed from 5 mA to 30mA, the input voltage range of 2.8V to 4.8 V.

关 键 词：电荷泵 低纹波 恒压输出 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN873