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TLC5947RHBRG4

更新时间： 2024-09-16 12:02:35
品牌 Logo 应用领域
德州仪器 - TI 振荡器驱动器
页数 文件大小 规格书
29页 1088K
描述
24-Channel, 12-Bit PWM LED Driver with Internal Oscillator

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TLC5947RHBRG4 数据手册

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TLC5947  
www.ti.com ................................................................................................................................................. SBVS114A–JULY 2008–REVISED SEPTEMBER 2008  
24-Channel, 12-Bit PWM LED Driver with  
Internal Oscillator  
1
FEATURES  
•
Noise Reduction:  
23  
•
24 Channels, Constant Current Sink Output  
30-mA Capability (Constant Current Sink)  
12-Bit (4096 Steps) PWM Grayscale Control  
LED Power-Supply Voltage up to 30 V  
VCC = 3.0 V to 5.5 V  
–
4-channel grouped delay to prevent inrush  
current  
•
•
•
•
•
•
Operating Temperature: –40°C to +85°C  
APPLICATIONS  
•
•
•
•
Static LED Displays  
Message Boards  
Amusement Illumination  
TV Backlighting  
Constant Current Accuracy:  
–
–
Channel-to-Channel = ±2% (typ)  
Device-to-Device = ±2% (typ)  
•
•
•
CMOS Logic Level I/O  
DESCRIPTION  
30-MHz Data Transfer Rate (Standalone)  
15-MHz Data Transfer Rate (Cascaded Devices,  
SCLK Duty = 50%)  
The TLC5947 is a 24-channel, constant current sink  
LED driver. Each channel is individually adjustable  
with 4096 pulse-width modulated (PWM) steps. PWM  
control is repeated automatically with the  
programmed grayscale (GS) data. GS data are  
written via a serial interface port. The current value of  
all 24 channels is set by a single external resistor.  
•
Shift Out Data Changes With Falling Edge to  
Avoid Data Shift Errors  
•
•
•
Auto Display Repeat  
4-MHz Internal Oscillator  
Thermal Shutdown (TSD):  
The TLC5947 has a thermal shutdown (TSD) function  
that turns off all output drivers during an  
over-temperature condition. All of the output drivers  
automatically restart when the temperature returns to  
normal conditions.  
–
Automatic shutdown at over temperature  
conditions  
–
Restart under normal temperature  
VLED  
VLED  
VLED  
VLED  
¼
¼
¼
¼
¼
¼
¼
¼
¼
¼
¼
OUT0  
OUT23  
SOUT  
OUT0  
SIN  
OUT23  
SOUT  
DATA  
SIN  
SCLK  
SCLK  
SCLK  
XLAT  
BLANK  
VCC  
VCC  
Controller  
XLAT  
TLC5947  
TLC5947  
ICn  
XLAT  
BLANK  
IC1  
VCC  
GND  
VCC  
GND  
BLANK  
IREF  
IREF  
RIREF  
RIREF  
3
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 © 2008, Texas Instruments Incorporated  
1234567...29

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TLC5947RHBRG4 替代型号

型号 品牌 替代类型 描述 数据表
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