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DM634 参数 Datasheet PDF下载

DM634图片预览
型号: DM634
PDF下载: 下载PDF文件 查看货源
内容描述: 16通道恒流LED驱动器,具有可编程PWM输出 [16-CHANNEL CONSTANT CURRENT LED DRIVER WITH PROGRAMMABLE PWM OUTPUTS]
分类和应用: 驱动器输出元件
文件页数/大小: 25 页 / 581 K
品牌: SITI [ SILICON TOUCH TECHNOLOGY INC. ]
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點晶科技股份有限公司  
SILICON TOUCH TECHNOLOGY INC.  
新竹市科學園區展業一9號71  
9-7F-1, Prosperity Road, Hsin-Chu, Taiwan, R.O.C.  
DM634  
Tel886-3-5645656  
Fax886-3-5645626  
DM634  
16-CHANNEL CONSTANT CURRENT LED DRIVER  
WITH PROGRAMMABLE PWM OUTPUTS  
General Description  
DM634 is a 16-channel constant current sink LED driver. Each channel has adjustable 16-bits  
(65536 steps) grayscale PWM control current outputs. 7-bit global brightness control is included in  
supporting user to adjust chip current easily. It incorporates shift registers, data latches, constant  
current circuitry with current value set by an external resistor, selectable oscillator source for PWM  
functioning, and built-in LED open/short detection circuit to detect error status. It supports thermal  
alarm and shutdown function; system retrieve the message to indicate when junction temperature  
over limitation of chip. It is specifically designed for LED display and lighting applications.  
Features  
z Constant-current outputs: 5mA to 90mA  
z 16-bit linear PWM control current output per channel  
z 7-bit high accuracy global brightness control  
z Maximum output voltage: 17V  
z Maximum clock frequency: 25MHz  
z Selectable internal/external PWM reference clock  
z PWM free-running capability (refresh rate ~ 275 Hz with internal oscillator ~ 18 MHz)  
z Build-in real-time LED open/short detection  
z Thermal Alarm and Shotdown –  
Alarm : Junction Temperature >110℃  
Shutdown : Junction Temperature > 180℃  
z Package and pin assignment (except QFN32) compatible to conventional LED driver series  
(ST2221C, DM134B/5B, DM13C)  
z Power supply voltage: 3.3V to 5.5 V  
Applications  
z Indoor/Outdoor LED Video Display  
z LED Variable Message Signs (VMS) System  
z LED Decorative Lighting  
Package Types  
z SOP24, SSOP24, TSSOP24E (with exposed pad)  
16-channel 16-bit PWM Constant Current LED Driver  
Version : A.003  
Page 1  
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