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TM1903 Datasheet(PDF) 1 Page - Shenzhen Putianhe Technology Co., Ltd

Part # TM1903
Description  3 - channel LED constant current drive
PDF  15 Pages
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Manufacturer  PTH [Shenzhen Putianhe Technology Co., Ltd]
Direct Link  http://www.szpth.com/
Logo PTH - Shenzhen Putianhe Technology Co., Ltd

TM1903 Datasheet(HTML) 1 Page - Shenzhen Putianhe Technology Co., Ltd

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background image
3333 通道
通道
通道
通道 LED
LED
LED
LED 恒流驱动
恒流驱动
恒流驱动
恒流驱动
TM1903
TM1903
TM1903
TM1903
www.szpth.c”m
特性描述
特性描述
特性描述
特性描述
TM1903是三通道LED 发光二极管 恒流驱动控制专用电路,内部集成有MCU数字
接口 数据锁存器 LED高压恒流驱动等电路 通过外围MCU单线串行控制实现该芯片
的单独辉度 级联控制实现户外大屏的彩色点阵发光控制 本产品性能优良 质量可靠
功能特点
功能特点
功能特点
功能特点
采用高压功率CMOS工艺
输出端口耐压24V
芯片工作电压支持7~24V
辉度调节电路,256级辉度可调,低亮度时等效1024级
单线串行级联接口
振荡方式 内置RC振荡并根据数据线上信号进行时钟同步,在接收完本单元的数据后
能自动将后续数据整形后通过数据输出端发送至下级,信号不随级联变远而出现失真
或衰减
内置上电复位电路
PWM控制端能够实现256级调节,扫描频率不低于2Khz/s
恒流控制端能够实现32级调节
能通过一根信号线完成数据的接收与解码
当刷新速率为30帧/s时,级联数低速模式下不小于512点,高速模式下不小于1024点
数据发送速度可达400Kbps与800Kbps两种模式
封装形式 SOP8 DIP8
外部
外部
外部
外部应用
应用
应用
应用框图
框图
框图
框图
适用领域 点光源 护栏管 软灯条 户内 外大屏等
控
器
TM1903
DIN
OUTR
OUTB
DO
IC1
VLED
VLED
TM1903
DIN
DO
ICn
VLED
OUTG
OUTR
OUTB
VLED
VLED
VLED
OUTG
DI
VDD
GND
VDD
VDD
GND
VDD
VCC
GND
VCC
DO
DO
SET
SET
NEXT


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