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TLC5942RHBR

更新时间： 2024-11-06 04:28:07
品牌 Logo 应用领域
德州仪器 - TI 驱动器
页数 文件大小 规格书
33页 1086K
描述
16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction

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TLC5942RHBR 数据手册

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TLC5942  
www.ti.com  
SBVS096B–OCTOBER 2007–REVISED OCTOBER 2007  
16-Channel, 12-Bit PWM LED Driver with  
7-Bit Dot Correction  
1
FEATURES  
•
Readable Error Information:  
23  
•
16 Channels, Constant Current Sink Output  
–
–
LED Open Detection  
•
•
50-mA Capability (Constant Current Sink)  
Thermal Error Flag (TEF)  
12-Bit (4096 Steps) Grayscale Control with  
PWM  
•
•
Noise Reduction:  
–
4-Channel grouped delay to prevent inrush  
current  
•
7-Bit (128 Steps) Dot Correction with Sink  
Current  
Operating Temperature: –40°C to +85°C  
•
•
LED Power-Supply Voltage up to 17 V  
Constant Current Accuracy:  
APPLICATIONS  
•
Monochrome, Multicolor, Full-Color LED  
Displays  
–
–
Channel-to-Channel = ±1.5%  
Device-to-Device = ±3%  
•
•
LED Signboards  
Display Backlighting  
•
•
•
•
•
VCC = 3.0 V to 5.5 V  
CMOS Level I/O  
30-MHz Data Transfer Rate  
30-MHz Grayscale Control Clock  
DESCRIPTION  
The TLC5942 is a 16-channel, constant current sink  
driver. Each channel is individually adjustable with  
4096 pulse-width modulated (PWM) steps and 128  
constant current sink steps for dot correction. Dot  
correction adjusts the brightness variations between  
LEDs. Both grayscale control and dot correction are  
accessible via separate, dedicated serial interface  
ports. The maximum current value of all 16 channels  
can be set by a single external resistor.  
Dedicated Ports for Grayscale and Dot  
Correction  
•
•
Continuous Base LED Open Detection (LOD)  
Thermal Shutdown (TSD):  
–
Automatic shutdown at high temperature  
conditions  
–
Restart under normal temperature  
VLED  
VLED  
VLED  
VLED  
¼
¼
¼
¼
¼
OUT0  
OUT15  
OUT0  
OUT15  
GSDATA  
GSSIN  
GSSOUT  
GSSIN  
GSSCLK  
GSSOUT  
GSSCLK  
Controller  
GSSCLK  
for Grayscale  
(Outside of  
LED module)  
XGSLAT  
BLANK  
TLC5942  
IC1  
TLC5942  
ICn  
XGSLAT  
BLANK  
DCSIN  
DCSCLK  
XDCLAT  
IREF  
XGSLAT  
BLANK  
DCSIN  
DCSCLK  
XDCLAT  
IREF  
ERROR  
READ  
DCSOUT  
VCC  
VCC  
VCC  
GND  
VCC  
GND  
RIREF  
RIREF  
DCDATA  
DCSCLK  
XDCLAT  
Controller for  
Dot Correction  
with  
Correction  
Data ROM  
(Inside of  
LED module)  
Typical Application Circuit (Multiple Daisy-Chained TLC5942s)  
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, Inc.  
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 © 2007, Texas Instruments Incorporated  
1234567...33

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