Driver. TLC5946 Datasheet

TLC5946 Datasheet PDF


Part

TLC5946

Description

16-Channel 12-Bit PWM LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
Download TLC5946 Datasheet


TLC5946 Datasheet
TLC5946
www.ti.com .......................................................................................................................................................... SLVS824B – MARCH 2008 – REVISED JUNE 2008
16-Channel, 12-Bit PWM LED Driver with
6-Bit Dot Correction
FEATURES
1
23 16 Channels, Constant Current Sink Output
40-mA Capability (Constant Current Sink)
12-Bit (4096 Steps) Grayscale PWM Control
6-Bit (64 Steps) Dot Correction
LED Power-Supply Voltage up to 17 V
VCC = 3.0 V to 5.5 V
Constant Current Accuracy:
– Channel-to-Channel = ±1% (typ)
– Device-to-Device = ±2% (typ)
30-MHz Data Transfer Rate
33-MHz Grayscale PWM Clock
Extended Serial Interface
CMOS Level I/O
Schmitt Buffer Input
Readable Error Information:
– Continuous Base LED Open Detection
(LOD)
– Thermal Error Flag (TEF)
Noise Reduction:
– 4-Channel Grouped Delay
Operating Temperature: –40°C to +85°C
APPLICATIONS
Monochrome, Multicolor, Full-Color LED
Displays
LED Signboards
Display Backlighting
DESCRIPTION
The TLC5946 is a 16-channel, constant current sink
LED driver. Each channel is individually adjustable
with 4096 pulse-width modulated (PWM) steps and
64 constant current sink steps for dot correction. The
dot correction adjusts the brightness variations
between LEDs. Both grayscale control and dot
correction are accessible via a serial interface. The
maximum current value of all 16 channels can be set
by a single external resistor.
The TLC5946 has two error information circuits: one
for LED open detection (LOD), and a thermal error
flag (TEF). LOD detects a broken or disconnected
LED during display period. TEF indicates an
over-temperature condition.
VLED
VLED
VCC
¼¼
VLED
VLED
¼
Controller
OUT
XERR
SCLK
XLAT
MODE
BLANK
GSCLK
IN
RIREF
¼OUT0
OUT15
SIN SOUT
XERR
SCLK
XLAT TLC5946
MODE
IC1
BLANK
VCC
GSCLK
XHALF
IREF
GND
VCC
RIREF
OUT0
SIN
XERR
¼ OUT15
SOUT
SCLK
XLAT TLC5946
MODE
ICn
BLANK
VCC
GSCLK
XHALF
IREF
GND
VCC
6
Typical Application Circuit (Multiple Daisy-Chained TLC5946s)
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, Inc.
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

TLC5946 Datasheet
TLC5946
SLVS824B – MARCH 2008 – REVISED JUNE 2008 .......................................................................................................................................................... www.ti.com
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
TLC5946
TLC5946
TLC5946
PACKAGE-LEAD
TSSOP-28
HTSSOP-28 PowerPAD™
5 mm × 5 mm QFN-32
ORDERING NUMBER
TLC5946PW
TLC5946PWP
TLC5946RHB
(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
IOUT
VIN
VOUT
TJ(ABS)
TSTG
PARAMETER
Supply voltage: VCC
Output current (dc)
OUT0 to OUT15
XERR
Input voltage range: SIN, SCLK, GSCLK, XLAT, BLANK, MODE, XHALF,
IREF
Output voltage range
SOUT, XERR
OUT0 to OUT15
Operating temperature range: junction temperature
Storage temperature range
ESD rating
Human body model (HBM),
JEDEC JESD22-A114
Charged device model (CDM),
JEDEC JESD22-C101
TLC5946
–0.3 to +6.0
50
6
–0.3 to VCC + 0.3
–0.3 to VCC + 0.3
–0.3 to +18
–40 to +150
–55 to +150
2
500
UNIT
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.
DISSIPATION RATINGS
PACKAGE
TSSOP-28
HTSSOP-28 with
PowerPAD soldered(1)
HTSSOP-28 with
PowerPAD not soldered(2)
QFN-32 (3)
OPERATING FACTOR
ABOVE TA = +25°C
16.21 mW/°C
31.67 mW/°C
16.21 mW/°C
27.86 mW/°C
TA < +25°C
POWER RATING
2026 mW
3958 mW
2026 mW
3482 mW
TA = +70°C
POWER RATING
1296 mW
2533 mW
1296 mW
2228 mW
TA = +85°C
POWER RATING
1053 mW
2058 mW
1053 mW
1811 mW
(1) With PowerPAD soldered onto copper area on printed circuit board (PCB); 2 oz. copper. For more information, see SLMA002 (available
for download at www.ti.com).
(2) With PowerPAD not soldered onto copper area on PCB.
(3) The package thermal impedance is calculated in accordance with JESD51-5.
2 Submit Documentation Feedback
Product Folder Link(s): TLC5946
Copyright © 2008, Texas Instruments Incorporated


Features Datasheet pdf TLC5946 www.ti.com .................... ....................................... ....................................... ....................................... ................. SLVS824B – MARCH 20 08 – REVISED JUNE 2008 16-Channel, 12 -Bit PWM LED Driver with 6-Bit Dot Corr ection FEATURES 1 •23 16 Channels, C onstant Current Sink Output • 40-mA C apability (Constant Current Sink) • 1 2-Bit (4096 Steps) Grayscale PWM Contro l • 6-Bit (64 Steps) Dot Correction LED Power-Supply Voltage up to 17 V • VCC = 3.0 V to 5.5 V • Constant C urrent Accuracy: – Channel-to-Channel = ±1% (typ) – Device-to-Device = ± 2% (typ) • 30-MHz Data Transfer Rate • 33-MHz Grayscale PWM Clock • Exte nded Serial Interface • CMOS Level I/ O • Schmitt Buffer Input • Readable Error Information: – Continuous Base LED Open Detection (LOD) – Thermal E rror Flag (TEF) • Noise Reduction: 4-Channel Grouped Delay • Operating Temperature: –40°C to +85°C APPLICATIONS • Monochrome, Multicolor, Full-Color LED Displays • LED Signboards.
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