16通道恒流LED驱动芯片的设计
发布时间：2018-09-04 16:12
【摘要】：近年来,随着光电子技术、微电子技术、计算机技术、通信技术和图像处理技术等的飞速发展,导致了LED大屏幕显示系统的出现,并由于其亮度高、色彩鲜艳、可靠性好、使用寿命长、环境适应能力强、成本低等诸多优点,从而在广告、证券、交通、体育等众多领域得到广泛应用。而LED显示屏的应用需要专门的LED驱动控制芯片,它使LED获得均匀、稳定的电流,从而使LED显示更加均匀,以满足各种场合的应用要求,而且可以延长LED的使用寿命。LED显示屏的广泛应用,促进了LED恒流驱动芯片的发展,也对其有了更高的要求。 本文设计了一款16路恒流LED驱动芯片,它采用UMC的0.35CDMOS工艺,电源电压为3.3V-5V,输出电流范围为2mA-90mA,且精确可调,输出可以承受17V的电压,以满足多个LED串联的需求,电流精度为芯片之间? 3%,通道之间? 1.5%,数据时钟为25MHz。整个设计包括带隙基准模块,电流调节模块,上电复位模块,过热保护模块,输入输出端口模块,输出级模块和数字逻辑控制模块。 本文在基于对多通道LED恒流驱动芯片的原理分析的基础上,在具体的性能指标的指导下,进行了子电路的分析、设计与仿真和整体电路的联合仿真,并分析、介绍了版图的布局、设计与验证,最后进行了后仿真。通过对测试数据的分析,芯片较好的实现了功能,与SPEC较符合,而且具有较小的芯片面积。
[Abstract]:In recent years, with the rapid development of optoelectronic technology, microelectronics technology, computer technology, communication technology and image processing technology, LED large screen display system appears, and because of its high brightness, bright colors, good reliability. It has many advantages, such as long service life, strong adaptability to the environment, low cost and so on. It has been widely used in many fields such as advertising, securities, transportation, sports and so on. The application of LED screen requires a special LED driver and control chip, which makes the LED obtain uniform and stable current, thus making the LED display more uniform, so as to meet the requirements of various applications. Moreover, it can prolong the service life of LED. The wide application of LED display screen promotes the development of LED constant current drive chip, and has higher requirements for it. A 16-channel constant-current LED driver chip is designed in this paper. It adopts the 0.35CDMOS technology of UMC, the power supply voltage is 3.3V-5V, the output current range is 2mA-90mA, and the output voltage can withstand 17V, so as to meet the needs of multiple LED series. The current accuracy is between chips? 3? between channels? 1.5? the data clock is 25 MHz. The whole design includes bandgap reference module, current regulation module, power on reset module, overheat protection module, input and output port module, output stage module and digital logic control module. Based on the analysis of the principle of multi-channel LED constant current drive chip, and under the guidance of specific performance index, this paper analyzes the sub-circuit, designs and simulates the whole circuit. The layout, design and verification of the layout are introduced. Finally, the post-simulation is carried out. Through the analysis of the test data, the chip realizes the function well, accords with the SPEC, and has a small chip area.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TN312.8
本文编号：2222683
[Abstract]:In recent years, with the rapid development of optoelectronic technology, microelectronics technology, computer technology, communication technology and image processing technology, LED large screen display system appears, and because of its high brightness, bright colors, good reliability. It has many advantages, such as long service life, strong adaptability to the environment, low cost and so on. It has been widely used in many fields such as advertising, securities, transportation, sports and so on. The application of LED screen requires a special LED driver and control chip, which makes the LED obtain uniform and stable current, thus making the LED display more uniform, so as to meet the requirements of various applications. Moreover, it can prolong the service life of LED. The wide application of LED display screen promotes the development of LED constant current drive chip, and has higher requirements for it. A 16-channel constant-current LED driver chip is designed in this paper. It adopts the 0.35CDMOS technology of UMC, the power supply voltage is 3.3V-5V, the output current range is 2mA-90mA, and the output voltage can withstand 17V, so as to meet the needs of multiple LED series. The current accuracy is between chips? 3? between channels? 1.5? the data clock is 25 MHz. The whole design includes bandgap reference module, current regulation module, power on reset module, overheat protection module, input and output port module, output stage module and digital logic control module. Based on the analysis of the principle of multi-channel LED constant current drive chip, and under the guidance of specific performance index, this paper analyzes the sub-circuit, designs and simulates the whole circuit. The layout, design and verification of the layout are introduced. Finally, the post-simulation is carried out. Through the analysis of the test data, the chip realizes the function well, accords with the SPEC, and has a small chip area.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TN312.8
【引证文献】
相关硕士学位论文 前3条
1 李昌红;用于LED显示屏16通道恒流驱动芯片设计[D];电子科技大学;2012年
2 齐丹;一种16通道恒流LED驱动芯片设计[D];电子科技大学;2013年
3 蒋明明;OLED驱动芯片恒流驱动模块的设计[D];哈尔滨工业大学;2013年
，本文编号：2222683
本文链接：https://www.wllwen.com/wenyilunwen/guanggaoshejilunwen/2222683.html
