Linear LT3745 16路50mA LED驱动方案
关键词：
led驱动 , linear , lt3745
linear公司的lt3745是带55v降压控制器的16路50ma led驱动器,每路可点亮75ma/36v 串联led,而降压控制器产生合适的总线电压给并联led串供电.每路有6位点阵电流修正,12位灰度pwm调光.led电流匹配在+/-3%内.主要用在大屏幕显示器led背光,单色/多色/全色led显示器以及led信号板.本文介绍了lt3745 主要特性,方框图以及典型应用电路.
lt3745:16-channel 50ma led driver with buck controller
the lt.3745 integrates a 16-channel led driver with a 55v buck controller. the led driver lights up to 75ma/36v of leds in series per channel, and the buck controller generates an adaptive bus voltage supplying the parallel led strings. each channel has individual 6-bit dot correction current adjustment and 12-bit grayscale pwm dimming.
both dot correction and grayscale are accessible via a serial data interface in ttl/cmos logic. a +/-3% led current matching and a 0.5μs minimum led on-time can be achieved at 50ma per channel.
the lt3745 performs full diagnostic and protection against open/short led and overtemperature fault. the fault status is sent back through the serial data interface.
the 30mhz fully-buffered, skew-balanced, cascadable serial data interface makes the chip extremely suitable for large screen lcd dynamic backlighting and mono-,multi-, full-color led displays.
lt3745 主要特性:
6v to 55v power input voltage range
16 independent led outputs up to 75ma/36v
±3% led current matching at 50ma (typ ±1%)
6-bit dot correction current adjustment
12-bit grayscale pwm dimming
0.5μs minimum led on-time
adaptive led bus voltage for high efficiency
cascadable 30mhz serial data interface
full diagnostic and protection: individual open/short
led and overtemperature fault
40-lead 6mmx6mm qfn package
lt3745应用:
large screen display led backlighting
mono-, multi-, full-color led displays
led billboards and signboards
2011-9-27 10:41:07 上传
下载附件 (33.94 kb)
图1. lt3745方框图
2011-9-27 10:41:07 上传
下载附件 (26.78 kb)
图2. lt3745 16路led驱动器: 500khz降压,每路led电流25ma 到75ma,100hz 12位调光
2011-9-27 10:41:07 上传
下载附件 (20.1 kb)
图3. lt3745 16路led驱动器: 1mhz降压,每路10个led,电流25ma 到75ma,500hz 12位调光
详情请见:
3745f[1].pdf(379.9 kb, 下载次数: 0)2011-9-27 10:40:52 上传
下载次数: 0
下载积分: 积分 -1
人工智能的服务市场即将迎来突破性的发展
使用STM32WB设计BLE应用时影响功耗的内容
自动贴标机如何实现远程监控与智能运维
LM317制作的发射电路
华为官宣Mate20X5G版将于7月26日发布
Linear LT3745 16路50mA LED驱动方案
5G时代文化旅游有了怎样的改变
AMD公布GPU发展的线路图
字节跳动公众号发布声明，将正式起诉特朗普政府
韦尔股份将以不超过40亿人民币增持北京君正股票
《中国联通5G车载终端白皮书》发布，移远通信携手推进智能网联汽车产业加速发展
电气火灾监控系统的功能都有哪些
iPhone6正式停产 系列产品销量占据苹果手机总销量的10%以上
如何测量强力磁铁的强度
Cosmic Circuits为ARM提供PLLs
新能源智能汽车创新峰会将在湖州举办
Anaqua被指定为通用汽车(GM)端对端知识产权管理提供商
阿里首次出现在自动驾驶计算机视觉算法集KITTI道路场景分割排行榜上
音质好的半入耳蓝牙耳机，200元内最好的蓝牙耳机
基于CC2530设计智慧农业控制系统
linear公司的lt3745是带55v降压控制器的16路50ma led驱动器,每路可点亮75ma/36v 串联led,而降压控制器产生合适的总线电压给并联led串供电.每路有6位点阵电流修正,12位灰度pwm调光.led电流匹配在+/-3%内.主要用在大屏幕显示器led背光,单色/多色/全色led显示器以及led信号板.本文介绍了lt3745 主要特性,方框图以及典型应用电路.
lt3745:16-channel 50ma led driver with buck controller
the lt.3745 integrates a 16-channel led driver with a 55v buck controller. the led driver lights up to 75ma/36v of leds in series per channel, and the buck controller generates an adaptive bus voltage supplying the parallel led strings. each channel has individual 6-bit dot correction current adjustment and 12-bit grayscale pwm dimming.
both dot correction and grayscale are accessible via a serial data interface in ttl/cmos logic. a +/-3% led current matching and a 0.5μs minimum led on-time can be achieved at 50ma per channel.
the lt3745 performs full diagnostic and protection against open/short led and overtemperature fault. the fault status is sent back through the serial data interface.
the 30mhz fully-buffered, skew-balanced, cascadable serial data interface makes the chip extremely suitable for large screen lcd dynamic backlighting and mono-,multi-, full-color led displays.
lt3745 主要特性:
6v to 55v power input voltage range
16 independent led outputs up to 75ma/36v
±3% led current matching at 50ma (typ ±1%)
6-bit dot correction current adjustment
12-bit grayscale pwm dimming
0.5μs minimum led on-time
adaptive led bus voltage for high efficiency
cascadable 30mhz serial data interface
full diagnostic and protection: individual open/short
led and overtemperature fault
40-lead 6mmx6mm qfn package
lt3745应用:
large screen display led backlighting
mono-, multi-, full-color led displays
led billboards and signboards
2011-9-27 10:41:07 上传
下载附件 (33.94 kb)
图1. lt3745方框图
2011-9-27 10:41:07 上传
下载附件 (26.78 kb)
图2. lt3745 16路led驱动器: 500khz降压,每路led电流25ma 到75ma,100hz 12位调光
2011-9-27 10:41:07 上传
下载附件 (20.1 kb)
图3. lt3745 16路led驱动器: 1mhz降压,每路10个led,电流25ma 到75ma,500hz 12位调光
详情请见:
3745f[1].pdf(379.9 kb, 下载次数: 0)2011-9-27 10:40:52 上传
下载次数: 0
下载积分: 积分 -1
人工智能的服务市场即将迎来突破性的发展
使用STM32WB设计BLE应用时影响功耗的内容
自动贴标机如何实现远程监控与智能运维
LM317制作的发射电路
华为官宣Mate20X5G版将于7月26日发布
Linear LT3745 16路50mA LED驱动方案
5G时代文化旅游有了怎样的改变
AMD公布GPU发展的线路图
字节跳动公众号发布声明，将正式起诉特朗普政府
韦尔股份将以不超过40亿人民币增持北京君正股票
《中国联通5G车载终端白皮书》发布，移远通信携手推进智能网联汽车产业加速发展
电气火灾监控系统的功能都有哪些
iPhone6正式停产 系列产品销量占据苹果手机总销量的10%以上
如何测量强力磁铁的强度
Cosmic Circuits为ARM提供PLLs
新能源智能汽车创新峰会将在湖州举办
Anaqua被指定为通用汽车(GM)端对端知识产权管理提供商
阿里首次出现在自动驾驶计算机视觉算法集KITTI道路场景分割排行榜上
音质好的半入耳蓝牙耳机，200元内最好的蓝牙耳机
基于CC2530设计智慧农业控制系统