(PDF) TLC5945 Datasheet PDF | etcTI





TLC5945 Datasheet PDF

Part Number TLC5945
Description 16-Channel LED Driver
Manufacture etcTI
Total Page 30 Pages
PDF Download Download TLC5945 Datasheet PDF

Features: Datasheet pdf www.ti.com PWP RHB TLC5945 SLVS755 MARCH 2007 16-CHANNEL LED DRIVER WIT H DOT CORRECTION AND GRAYSCALE PWM CONT ROL FEATURES • 16 Channels • 12-bi t (4096 Steps) Grayscale PWM Control Dot Correction – 6 bit (64 Steps) Drive Capability (Constant-Current S ink) – 0 mA to 80 mA • LED Power Su pply Voltage up to 17 V • VCC = 3.0 V to 5.5 V • Serial Data Interface • 30-MHz Data Transfer Rate • CMOS Lev el I/O • Error Information – LOD: L ED Open Detection – TEF: Thermal Erro r Flag APPLICATIONS • Monocolor, Mul ticolor, Full-Color LED Displays • LE D Signboards • Display Back-lighting DESCRIPTION The TLC5945 is a 16-channel , constant-current sink, LED driver. Ea ch channel has an individually adjustab le 4096-step grayscale PWM brightness c ontrol and a 64-step constant-current s ink (dot correction). The dot correctio n adjusts the brightness variations bet ween LED channels and other LED drivers . Both grayscale control and dot correction are accessible via a serial interface. A single externa.

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TLC5945 datasheet
www.ti.com
PWP
RHB
TLC5945
SLVS755 – MARCH 2007
16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL
FEATURES
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
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 TLC5945 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 TLC5945 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
Constant-Current
Driver
OUT0
6−Bit Dot Correction
LED Open Detection
CNT
12−Bit Grayscale
PWM Control
Constant-Current
Driver
OUT1
6−Bit Dot Correction
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
OUT15
SOUT
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.
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 © 2007, Texas Instruments Incorporated

TLC5945 datasheet
TLC5945
SLVS755 – MARCH 2007
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
ORDERING INFORMATION
PACKAGE (1)
28-pin HTSSOP PowerPAD™
32-pin 5 mm x 5 mm QFN
PART NUMBER
TLC5945PWP
TLC5945RHB
(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)
Tstg Storage temperature range
TA Operating ambient temperature range
Package thermal impedance(3)
HTSSOP (PWP)(4)
QFN (RHB)(4)
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
–55°C to 150°C
–40°C to 85°C
31.58°C/W
35.9°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.
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