Driver. TLC5948A Datasheet

TLC5948A Datasheet PDF


Part

TLC5948A

Description

16-Channel 16-Bit ES-PWM Full Self-Diagnosis LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
Download TLC5948A Datasheet


TLC5948A Datasheet
TLC5948A
www.ti.com
SBVS192A – MARCH 2012 – REVISED DECEMBER 2012
16-Channel, 16-Bit, ES-PWM, Full Self-Diagnosis LED Driver for
7-Bit DC and 7-Bit Global BC LED Lamp
Check for Samples: TLC5948A
FEATURES
1
23 16 Constant-Current Sink Output Channels
• Sink Current Capability with Maximum DC and
BC Data:
– 2 mA to 45 mA (VCC 3.6 V)
– 2 mA to 60 mA (VCC > 3.6 V)
• Dot Correction (DC):
– 7-Bit (128 Steps) with 0% to 100% Range
• Global Brightness Control (BC):
– 7-Bit (128 Steps) with 25% to 100% Range
• Grayscale Control (GS) with Enhanced
Spectrum or Conventional PWM:
– 16-Bit (65,536 Steps)
• LED Power-Supply Voltage: Up to 10 V
• VCC: 3.0 V to 5.5 V
• Constant-Current Accuracy:
– Channel-to-Channel: ±0.6% (typ), ±2% (max)
– Device-to-Device: ±1% (typ), ±4% (max)
• Data Transfer Rate: 33 MHz
• Grayscale Control Clock: 33 MHz
• Auto Display Repeat and Auto Data Refresh
• Display Timing Reset
• Power-Save Mode to Minimize VCC Current
• LOD and LSD with Invisible Detection
Mode (IDM)
• Output Leakage Detection (OLD)
• Current Reference Terminal Short Flag (ISF)
• Thermal Shutdown (TSD) and Error Flag (TEF)
• Pre-Thermal Warning (PTW)
• Four-Channel Grouped Delay Switching to
Prevent Inrush Current
• Operating Temperature: –40°C to +85°C
APPLICATIONS
• LED Video Displays
• LED Signboards
DESCRIPTION
The TLC5948A is a 16-channel, constant-current sink
LED driver. Each channel has an individually-
adjustable, pulse width modulation (PWM) grayscale
(GS) brightness control with 65,536 steps and 128
steps of constant-current dot correction (DC). DC
adjusts brightness deviation between channels. All
channels have a 128-step global brightness control
(BC). BC adjusts brightness deviation with other LED
drivers. GS, DC, and BC data are accessible with a
serial interface port.
The TLC5948A has six error flags: LED open
detection (LOD), LED short detection (LSD), output
leakage detection (OLD), reference current terminal
short flag detection (ISF), pre-thermal warning (PTW),
and thermal error flag (TEF). The error detection
results can be read with a serial interface port.
VLED
¼¼
¼
DATA
SCLK
LAT
GSCLK
Controller
RIREF
Data Read
¼¼
¼OUT0
OUT15
SIN
SCLK
SOUT
VCC
LAT Device 1
GSCLK
VCC
IREF
GND
RIREF
3
¼
¼OUT0
OUT15
SIN
SCLK
LAT Device n
GSCLK
SOUT
VCC
VCC
IREF
GND
Typical Application Circuit (Multiple Daisy-Chained TLC5948As)
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
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 © 2012, Texas Instruments Incorporated

TLC5948A Datasheet
TLC5948A
SBVS192A – MARCH 2012 – REVISED DECEMBER 2012
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.
PRODUCT
TLC5948A
PACKAGE AND ORDERING INFORMATION(1)
PACKAGE-LEAD
PACKAGE
DESIGNATOR
ORDERING
NUMBER
SSOP-24, QSOP-24
DBQ
TLC5948ADBQR
TLC5948ADBQ
HTSSOP-24 PowerPAD™
PWP
TLC5948APWPR
TLC5948APWP
TRANSPORT MEDIA,
QUANTITY
Tape and Reel, 2500
Tube, 50
Tape and Reel, 2000
Tube, 60
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or visit the
device product folder at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
Over operating free-air temperature range, unless otherwise noted.
Voltage (2)
Current
Temperature
Electrostatic discharge (ESD)
ratings:
VCC
SIN, SCLK, LAT, GSCLK, IREF
SOUT
OUT0 to OUT15
OUT0 to OUT15
Operating junction, TJ (max)
Storage, Tstg
Human body model (HBM)
Charged device model (CDM)
VALUE
MIN MAX
–0.3 +6.0
–0.3
–0.3
–0.3
VCC + 0.3
VCC + 0.3
+11
+70
+150
–55 +150
4000
2000
UNIT
V
V
V
V
mA
°C
°C
V
V
(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 my affect device reliability.
(2) All voltages are with respect to device ground terminal.
THERMAL INFORMATION
THERMAL METRIC(1)
θJA
θJCtop
θJB
ψJT
ψJB
θJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
TLC5948A
DBQ
(SSOP, QSOP)
PWP
(HTSSOP)
24 PINS
24 PINS
80.4 39.9
44.2 23.2
33.5 21.5
8.8 0.6
33.2 21.3
N/A 3.8
UNITS
°C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
2 Submit Documentation Feedback
Product Folder Links: TLC5948A
Copyright © 2012, Texas Instruments Incorporated


Features Datasheet pdf TLC5948A www.ti.com SBVS192A – MARCH 2012 – REVISED DECEMBER 2012 16-Cha nnel, 16-Bit, ES-PWM, Full Self-Diagnos is LED Driver for 7-Bit DC and 7-Bit Gl obal BC LED Lamp Check for Samples: TLC 5948A FEATURES 1 •23 16 Constant-Cur rent Sink Output Channels • Sink Curr ent Capability with Maximum DC and BC D ata: – 2 mA to 45 mA (VCC ≤ 3.6 V) – 2 mA to 60 mA (VCC > 3.6 V) • Dot Correction (DC): – 7-Bit (128 Steps) with 0% to 100% Range • Global Brigh tness Control (BC): – 7-Bit (128 Step s) with 25% to 100% Range • Grayscale Control (GS) with Enhanced Spectrum or Conventional PWM: – 16-Bit (65,536 S teps) • LED Power-Supply Voltage: Up to 10 V • VCC: 3.0 V to 5.5 V • Con stant-Current Accuracy: – Channel-to- Channel: ±0.6% (typ), ±2% (max) – D evice-to-Device: ±1% (typ), ±4% (max) • Data Transfer Rate: 33 MHz • Gra yscale Control Clock: 33 MHz • Auto D isplay Repeat and Auto Data Refresh • Display Timing Reset • Power-Save Mode to Minimize VCC Current • LOD and LSD with Invisible Detection Mode (ID.
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