Driver. TLC5941 Datasheet

TLC5941 Datasheet PDF


Part

TLC5941

Description

16-Channel LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
Download TLC5941 Datasheet


TLC5941 Datasheet
TLC5941
www.ti.com
PWP
RHB
NT
SLVS589D – JULY 2005 – REVISED JANUARY 2008
16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL
FEATURES
1
2 16 Channels
12-Bit (4096 Steps) Grayscale PWM Control
Dot Correction
– 6 Bit (64 Steps)
Drive Capability (Constant-Current Sink)
– 0 mA to 80 mA
LED Power Supply Voltage up to 17 V
VCC = 3.0 V to 5.5 V
Serial Data Interface
Controlled In-Rush Current
30-MHz Data Transfer Rate
CMOS Level I/O
Error Information
– LOD: LED Open Detection
– TEF: Thermal Error Flag
APPLICATIONS
Monocolor, Multicolor, Full-Color LED Displays
LED Signboards
Display Back-Lighting
DESCRIPTION
The TLC5941 is a 16-channel, constant-current sink,
LED driver. Each channel has an individually
adjustable 4096-step grayscale PWM brightness
control and a 64-step constant-current sink (dot
correction). The dot correction adjusts the brightness
variations between LED channels and other LED
drivers. Both grayscale control and dot correction are
accessible via a serial interface. A single external
resistor sets the maximum current value of all 16
channels.
The TLC5941 features two error information circuits.
The LED open detection (LOD) indicates a broken or
disconnected LED at an output terminal. The thermal
error flag (TEF) indicates an overtemperature
condition.
VCC GND
SCLK
SIN
XLAT
IREF
Max. OUTn VREF
Current
=1.24V
GSCLK
BLANK
GS Counter CNT
0
Status
Information:
LOD,
TED,
DC DATA
191
96
192
96
MODE
10
0
MODE
10
GS Register
11 0
DC Register
50
Input
Shift
Register
192
95
10
MODE
96
96
GS Register
23 12
DC Register
11 6
CNT
12−Bit Grayscale
PWM Control
6−Bit Dot Correction
LED Open Detection
Constant-Current
Driver
Delay
x0
OUT0
CNT
12−Bit Grayscale
PWM Control
6−Bit Dot Correction
Constant-Current
Driver
Delay
x1
OUT1
LED Open Detection
Temperature
Error Flag
(TEF)
LED Open
Detection
(LOD)
XERR
Input
Shift
Register
191
GS Register
191 180
DC Register
95 90
CNT
12−Bit Grayscale
PWM Control
6−Bit Dot Correction
LED Open Detection
Constant-Current
Driver
Delay
x15
OUT15
SOUT
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.
2
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 © 2005–2008, Texas Instruments Incorporated

TLC5941 Datasheet
TLC5941
SLVS589D – JULY 2005 – REVISED JANUARY 2008
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TA
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
ORDERING INFORMATION
PACKAGE (1)
28-pin HTSSOP PowerPAD™
32-pin 5 mm x 5 mm QFN
28-pin PDIP
PART NUMBER
TLC5941PWP
TLC5941RHB
TLC5941NT
(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.
over operating free-air temperature range (unless otherwise noted)(1)
VI Input voltage range(2)
IO Output current (dc)
VI Input voltage range
VO Output voltage range
ESD rating
VCC
V(BLANK), V(SCLK), V(XLAT), V(MODE), V(SIN), V(GSCLK), V(IREF), V(TEST)
V(SOUT), V(XERR)
V(OUT0) to V(OUT15)
HBM (JEDEC JESD22-A114, Human Body Model)
CDM (JEDEC JESD22-C101, Charged Device Model)
TJ(max)
Tstg
TA
Operating junction temperature
Storage temperature range
Operating ambient temperature range
HTSSOP (PWP)(4)
Package thermal impedance(3) QFN (RHB)(4)
PDIP (NT)
UNIT
–0.3 V to 6 V
90 mA
–0.3 V to VCC +0.3 V
–0.3 V to VCC +0.3 V
–0.3 V to 18 V
2 kV
500 V
150°C
–55°C to 150°C
–40°C to 85°C
31.58°C/W
35.9°C/W
48°C/W
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
(4) With PowerPAD soldered on PCB with 2-oz. trace of copper. See TI application report SLMA002 for further information.
2 Submit Documentation Feedback
Product Folder Link(s): TLC5941
Copyright © 2005–2008, Texas Instruments Incorporated


Features Datasheet pdf TLC5941 www.ti.com PWP RHB NT SLVS58 9D – JULY 2005 – REVISED JANUARY 20 08 16-CHANNEL LED DRIVER WITH DOT CORR ECTION AND GRAYSCALE PWM CONTROL FEATU RES 1 •2 16 Channels • 12-Bit (4096 Steps) Grayscale PWM Control • Dot C orrection – 6 Bit (64 Steps) • Driv e Capability (Constant-Current Sink) 0 mA to 80 mA • LED Power Supply Vo ltage up to 17 V • VCC = 3.0 V to 5.5 V • Serial Data Interface • Contro lled In-Rush Current • 30-MHz Data Tr ansfer Rate • CMOS Level I/O • Erro r Information – LOD: LED Open Detecti on – TEF: Thermal Error Flag APPLICA TIONS • Monocolor, Multicolor, Full-C olor LED Displays • LED Signboards Display Back-Lighting DESCRIPTION The TLC5941 is a 16-channel, constant-curr ent sink, LED driver. Each channel has an individually adjustable 4096-step gr ayscale PWM brightness control and a 64 -step constant-current sink (dot correc tion). The dot correction adjusts the b rightness variations between LED channels and other LED drivers. Both grayscale control and dot correct.
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