TLC5944 Datasheet, PDF (1/34 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET

TLC5944
TLC5944
TLC5944
www.ti.com ...................................................................................................................................................................................................... SBVS112 – JUNE 2008
16-Channel, 12-Bit PWM LED Driver with
6-Bit Dot Correction and Pre-Charge FET
FEATURES
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•23 16 Channels, Constant Current Sink Output
• 60-mA Capability (Constant Current Sink)
• 12-Bit (4096 Steps) Grayscale Control with
PWM
• 6-Bit (64 Steps) Dot Correction with Sink
Current
• Internal Pre-Charge FET to Prevent LED
Ghosting Phenomenon on Multiplexed LED
Systems
• LED Power-Supply Voltage up to 15 V
• V_CC = 3.0 V to 5.5 V
• Constant Current Accuracy:
– Channel-to-Channel = ±1%
– Device-to-Device = ±3%
• CMOS Logic Level I/O
• 30-MHz Data Transfer Rate
• 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
• Thermal Shutdown (TSD):
– Automatic shutdown at over-temperature
conditions
– Restart under normal temperature
• Pre-Thermal Warning (PTW):
– High temperature operation alert
• Readable Error Information:
– LED Open Detection (LOD)
– Thermal Error Flag (TEF)
– Pre-Thermal Warning (PTW)
• Noise Reduction:
– 4-channel grouped delay to prevent inrush
current
• Operating Temperature: –40°C to +85°C
APPLICATIONS
• Monochrome, Multicolor, Full-Color LED
Displays Using Multiplexing System
• LED Signboards Using Multiplexing System
Controller
DATA
SCLK
DCSEL
XLAT
BLANK
GSCLK
FLAGS
READ
XERR
READ
R_IREF
OUT0 ^¼ OUT15
SIN
SOUT
SCLK
DCSEL
XERR
VLED
XLAT
BLANK
GSCLK
IREF
TLC5944
IC1
VUP
VCC ^VCC
VCC
GND
R_IREF
OUT0 ^¼ OUT15
SIN
SOUT
SCLK
DCSEL
XERR
VLED
XLAT
BLANK
GSCLK
IREF
TLC5944
ICn
VUP
VCC
VCC
GND
5
Typical Application Circuit (Multiple Daisy-Chained TLC5944s)
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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.
PowerPAD is a trademark of Texas Instruments, Incorporated.
2
All other trademarks are the property of their respective owners.
3
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