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TLC5944_1

更新时间： 2024-11-30 07:04:35
品牌 Logo 应用领域
德州仪器 - TI 驱动器
页数 文件大小 规格书
34页 983K
描述
16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET

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TLC5944_1 数据手册

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TLC5944  
www.ti.com ...................................................................................................................................................................................................... SBVS112–JUNE 2008  
16-Channel, 12-Bit PWM LED Driver with  
6-Bit Dot Correction and Pre-Charge FET  
1
FEATURES  
23  
•
16 Channels, Constant Current Sink Output  
•
Thermal Shutdown (TSD):  
•
60-mA Capability (Constant Current Sink)  
–
Automatic shutdown at over-temperature  
conditions  
•
•
•
12-Bit (4096 Steps) Grayscale Control with  
PWM  
–
Restart under normal temperature  
6-Bit (64 Steps) Dot Correction with Sink  
Current  
•
•
Pre-Thermal Warning (PTW):  
High temperature operation alert  
Readable Error Information:  
–
Internal Pre-Charge FET to Prevent LED  
Ghosting Phenomenon on Multiplexed LED  
Systems  
–
–
–
LED Open Detection (LOD)  
Thermal Error Flag (TEF)  
Pre-Thermal Warning (PTW)  
•
•
•
LED Power-Supply Voltage up to 15 V  
VCC = 3.0 V to 5.5 V  
•
•
Noise Reduction:  
Constant Current Accuracy:  
–
4-channel grouped delay to prevent inrush  
current  
–
–
Channel-to-Channel = ±1%  
Device-to-Device = ±3%  
Operating Temperature: –40°C to +85°C  
•
•
•
•
CMOS Logic Level I/O  
30-MHz Data Transfer Rate  
APPLICATIONS  
•
Monochrome, Multicolor, Full-Color LED  
Displays Using Multiplexing System  
LED Signboards Using Multiplexing System  
33-MHz Grayscale Control Clock  
Continuous Base LED Open Detection (LOD):  
•
–
Detect LED opening and LED short to GND  
during display with auto output off function  
VLED  
LINEn  
VLED  
LINE0  
¼
¼
¼
OUT0  
OUT15  
SOUT  
XERR  
OUT0  
SIN  
OUT15  
SOUT  
XERR  
DATA  
SIN  
SCLK  
SCLK  
SCLK  
DCSEL  
VLED  
VLED  
VCC  
DCSEL  
DCSEL  
XLAT  
XLAT  
XLAT  
VUP  
VUP  
BLANK  
Controller  
VCC  
BLANK  
BLANK  
GSCLK  
IREF  
VCC  
GSCLK  
GSCLK  
FLAGS  
VCC  
GND  
VCC  
GND  
IREF  
READ  
TLC5944  
TLC5944  
XERR  
READ  
RIREF  
RIREF  
IC1  
ICn  
5
Typical Application Circuit (Multiple Daisy-Chained TLC5944s)  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
PowerPAD is a trademark of Texas Instruments, Incorporated.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008, Texas Instruments Incorporated  
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