(PDF) TLC5944 Datasheet PDF | etcTI





TLC5944 Datasheet PDF

Part Number TLC5944
Description 16-Channel 12-Bit PWM LED Driver
Manufacture etcTI
Total Page 30 Pages
PDF Download Download TLC5944 Datasheet PDF

Features: Datasheet pdf TLC5944 TLC5944 TLC5944 www.ti.com .. ....................................... ....................................... ....................................... ....................................... SBVS112A – JUNE 2008 – REVISED JUL Y 2009 16-Channel, 12-Bit PWM LED Drive r with 6-Bit Dot Correction and Pre-Cha rge FET FEATURES 1 •23 16 Channels, Constant Current Sink Output • 60-mA Capability (Constant Current Sink) • 12-Bit (4096 Steps) Grayscale Control w ith PWM • 6-Bit (64 Steps) Dot Correc tion with Sink Current • Internal Pre -Charge FET to Prevent LED Ghosting Phe nomenon on Multiplexed LED Systems • LED Power-Supply Voltage up to 15 V • VCC = 3.0 V to 5.5 V • Constant Curr ent Accuracy: – Channel-to-Channel = ±1% – Device-to-Device = ±3% • CM OS Logic Level I/O • 30-MHz Data Tran sfer Rate • 33-MHz Grayscale Control Clock • Continuous Base LED Open Dete ction (LOD): – Detect LED opening and LED short to GND during display with auto output off function VLED LINEn VLED LINE0 ¼ • Thermal S.

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TLC5944 datasheet
TLC5944
TLC5944
TLC5944
www.ti.com .............................................................................................................................................................. SBVS112A – JUNE 2008 – REVISED JULY 2009
16-Channel, 12-Bit PWM LED Driver with
6-Bit Dot Correction and Pre-Charge FET
FEATURES
1
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
VCC = 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
RIREF
OUT0 ¼ OUT15
SIN SOUT
SCLK
DCSEL
XERR
VLED
XLAT
BLANK
GSCLK
IREF
TLC5944
IC1
VUP
VCC VCC
VCC
GND
RIREF
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)
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.
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 © 2008–2009, Texas Instruments Incorporated

TLC5944 datasheet
TLC5944
SBVS112A – JUNE 2008 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com
DESCRIPTION
The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096
pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC)
adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a
common serial interface port. The maximum current value of all 16 channels can be set by a single external
resistor.
The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on
multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a
thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and
a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the
TEF is set, all output drivers are turned off by the thermal shutdown (TSD) protection. Additionally, when the TEF
is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature
condition. The output drivers remain on when PTW is set.
blank
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION(1)
PRODUCT
TLC5944
TLC5944
PACKAGE-LEAD
HTSSOP-28 PowerPAD™
5 mm × 5 mm QFN-32
ORDERING NUMBER
TLC5944PWPR
TLC5944PWP
TLC5944RHBR
TLC5944RHBT
TRANSPORT MEDIA,
QUANTITY
Tape and Reel, 2000
Tube, 50
Tape and Reel, 3000
Tape and Reel, 250
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)(2)
Over operating free-air temperature range, unless otherwise noted.
VCC
VUP
IOUT
VIN
VOUT
TJ(max)
TSTG
PARAMETER
Supply voltage, VCC
Pre-charge voltage
Output current (dc)
XERR
OUT0 to OUT15
Input voltage range:
SIN, SCLK, XLAT, BLANK, GSCLK, DCSEL, IREF
Output voltage range
SOUT, XERR
OUT0 to OUT15
Operating junction temperature
Storage temperature range
ESD rating
Human body model (HBM)
Charged device model (CDM)
TLC5944
–0.3 to +6.0
–0.3 to +16
6
70
–0.3 to VCC + 0.3
–0.3 to VCC + 0.3
–0.3 to VUP + 0.3
+150
–55 to +150
2
500
UNIT
V
V
mA
mA
V
V
V
°C
°C
kV
V
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not supported.
(2) All voltage values are with respect to network ground terminal.
2 Submit Documentation Feedback
Product Folder Link(s): TLC5944
Copyright © 2008–2009, Texas Instruments Incorporated




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