Driver. TLC59461 Datasheet

TLC59461 Datasheet PDF


Part

TLC59461

Description

16-Channel 12-Bit PWM LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
Download TLC59461 Datasheet


TLC59461 Datasheet
TLC59461
www.ti.com............................................................................................................................................... SLVS896A – NOVEMBER 2008 – REVISED MARCH 2009
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 TLC59461 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 serial interface. The
maximum current value of all 16 channels can be set
by a single external resistor.
The TLC59461 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.
To allow lower power dissipation, the TLC59461 does
not implement the Auto Output Off function available
in the TLC5946.
VLED
VLED
VCC
¼¼
VLED
VLED
¼
Controller
OUT
XERR
SCLK
XLAT
MODE
BLANK
GSCLK
IN
RIREF
¼OUT0
OUT15
SIN SOUT
XERR
SCLK
XLAT TLC59461
MODE
IC1
BLANK
VCC
GSCLK
XHALF
IREF
GND
VCC
RIREF
OUT0
SIN
XERR
¼ OUT15
SOUT
SCLK
XLAT TLC59461
MODE
ICn
BLANK
VCC
GSCLK
XHALF
IREF
GND
VCC
6
Typical Application Circuit (Multiple Daisy-Chained TLC59461s)
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 © 2008–2009, Texas Instruments Incorporated

TLC59461 Datasheet
TLC59461
SLVS896A – NOVEMBER 2008 – REVISED MARCH 2009............................................................................................................................................... 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
TLC59461
PACKAGE-LEAD
HTSSOP-28 PowerPAD™
ORDERING NUMBER
TLC59461PWPR
TLC59461PWP
TRANSPORT MEDIA,
QUANTITY
Tape and Reel, 2000
Tube, 50
(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
TLC59461
–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
HTSSOP-28 with
PowerPAD soldered(1)
HTSSOP-28 with
PowerPAD not soldered(2)
OPERATING FACTOR
ABOVE TA = +25°C
31.67 mW/°C
16.21 mW/°C
TA < +25°C
POWER RATING
3958 mW
2026 mW
TA = +70°C
POWER RATING
2533 mW
1296 mW
TA = +85°C
POWER RATING
2058 mW
1053 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.
2 Submit Documentation Feedback
Product Folder Link(s): TLC59461
Copyright © 2008–2009, Texas Instruments Incorporated


Features Datasheet pdf TLC59461 www.ti.com.................... ....................................... ....................................... ....................................... ...... SLVS896A – NOVEMBER 2008 – R EVISED MARCH 2009 16-Channel, 12-Bit PW M LED Driver with 6-Bit Dot Correction FEATURES 1 •23 16 Channels, Constant -Current Sink Output • 40-mA Capabili ty (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 Se rial Interface • CMOS Level I/O • S chmitt Buffer Input • Readable Error Information: – Continuous Base LED Op en Detection (LOD) – Thermal Error Fl ag (TEF) • Noise Reduction: – 4-Cha nnel Grouped Delay • Operating Temper ature: –40°C to +85°C APPLICATIONS • Monochrome, Multicolor, Full-Color LED Displays • LED Signboards • Disp.
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