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TLC5929DBQ

更新时间： 2024-09-15 08:45:15
品牌 Logo 应用领域
德州仪器 - TI 驱动器
页数 文件大小 规格书
36页 650K
描述
16-Channel, Constant-Current LED Driver with 7-Bit Global Brightness Control, Power-Save Mode

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TLC5929DBQ 数据手册

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TLC5929  
www.ti.com  
SBVS159 –APRIL 2011  
16-Channel, Constant-Current LED Driver with 7-Bit Global Brightness Control,  
Power-Save Mode, and Full Self-Diagnosis for LED Lamp  
Check for Samples: TLC5929  
1
FEATURES  
•
•
2-ns Delayed Switching Between Each  
Channel Minimizes Inrush Current  
23  
•
16 Constant-Current Sink Output Channels  
with On/Off Control  
Operating Temperature: –40°C to +85°C  
•
Current Capability:  
APPLICATIONS  
–
–
40 mA (VCC ≤ 3.6 V)  
50 mA (VCC > 3.6 V)  
•
•
•
Variable Message Signs (VMS)  
Illumination  
•
•
•
•
Global Brightness Control: 7-Bit (128 Steps)  
Power-Supply Voltage Range: 3.0 V to 5.5 V  
LED Power-Supply Voltage: Up to 10 V  
Constant-Current Accuracy:  
LED Video Displays  
DESCRIPTION  
The TLC5929 is a 16-channel constant current sink  
LED driver. Each channel can be turned on or off by  
writing data to an internal register. The constant  
current value of all 16 channels is set by a single  
external resistor with 128 steps for the global  
brightness control (BC).  
–
–
Channel-to-Channel = ±1% (typ)  
Device-to-Device = ±2% (typ)  
•
•
•
Data Transfer Rate: 33 MHz  
BLANK Pulse Width: 40 ns (min)  
LED Open Detection (LOD)/LED Short  
Detection (LSD) with Invisible Detection Mode  
(IDM)  
The TLC5929 has six error flags: LED open detection  
(LOD), LED short detection (LSD), output leakage  
detection (OLD), reference current terminal short  
detection (ISF), pre-thermal warning (PTW) and  
thermal error flag (TEF). In addition, the LOD and  
LSD functions have invisible detection mode (IDM)  
that can detect those errors even when the output is  
off. The error detection results can be read via a  
serial interface port.  
•
Output Leakage Detection (OLD) Detects 3 µA  
Leak  
•
•
•
•
•
Pre-Thermal Warning (PTW)  
Thermal Shutdown (TSD)  
Current Reference Terminal Short Flag (ISF)  
Power-Save Mode with 10-µA Consumption  
Undervoltage Lockout Sets the Default Data  
The TLC5929 also has a power-save mode that sets  
the total current consumption to 10 µA (typ) when all  
outputs are off.  
Typical Application Circuit (Multiple Daisy-Chained TLC5929s)  
VLED  
¼
¼
¼
¼
¼
¼
¼
¼
OUT0  
SIN  
OUT15  
SOUT  
OUT0  
SIN  
OUT15  
SOUT  
DATA  
SCLK  
LAT  
VCC  
VCC  
SCLK  
LAT  
SCLK  
LAT  
TLC5929  
TLC5929  
ICn  
IC1  
VCC  
GND  
VCC  
GND  
BLANK  
BLANK  
IREF  
BLANK  
IREF  
Controller  
RIREF  
RIREF  
3
SID Read  
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.  
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 © 2011, Texas Instruments Incorporated  
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