Driver. TLC5970 Datasheet

TLC5970 Datasheet PDF


Part

TLC5970

Description

3-Channel 12-Bit PWM LED Driver

Manufacture

etcTI

Page 30 Pages
Datasheet
Download TLC5970 Datasheet


TLC5970 Datasheet
TLC5970
www.ti.com
3-Channel, 12-Bit, PWM LED Driver with
Buck DC/DC Converter and Differential Signal Interface
Check for Samples: TLC5970
SBVS140 – MARCH 2010
FEATURES
1
23 3-Channel, Constant-Current Sink Output
• Current Capability: 150 mA per channel
• Grayscale (GS) Control with PWM:
12-bit (4096 steps)
• Dot Correction (DC): 7-bit (128 steps)
• Global Brightness Control (BC):
7-bit (128 steps)
• EEPROM for Dot Correction Storage
• Input Voltage: Up to 36 V
• LED Supply Voltage: Up to 17 V with Auto LED
Anode Voltage Control
• Constant-Current Accuracy:
– Channel-to-Channel = ±0.5% (typ)
– Device-to-Device = ±3% (typ)
• Data Transfer Rate: 20 MHz
• Differential Signal Interface for Long Distance
Cascading
• Unlimited Device Cascading
• Auto Display Repeat/Auto Data Refresh
• Internal/External Selectable GS Clock
• Thermal Shutdown (TSD)
• Packages: HTSSOP-32 and QFN-28
APPLICATIONS
• Full-Color Static LED Displays for Building
Wall
• Long Distance and Large Area Illumination
DESCRIPTION
The TLC5970 is a three-channel, constant-current
sink driver with a buck dc/dc converter and a
differential signal interface. Each channel has
individually adjustable currents with 4096 PWM
grayscale (GS) steps and 128 constant-current sink
steps for dot correction (DC). The dot correction
adjusts the brightness variations between LEDs. The
DC data can be stored in the internal EEPROM. Also,
current through all three channels can be controlled
by global brightness control (BC) data with 128 steps.
GS control, DC, and BC are accessible via a
differential signal interface. The maximum current
value for each channel is set by a single external
resistor. The TLC5970 contains a dc/dc buck
converter. The dc/dc converter improves system
efficiency, reduces system level currents, and allows
thinner gauge wiring by optimizing the LED anode
voltage to keep the LED cathode voltage to 1 V. The
TLC5970 proivdes overtemperature protection by
turning all output drivers off when the IC temperature
is too high (exceeds +138°C).
Power
Supply
VCC
GND
0.01 mF
0.1 mF
Controller
SDTY
SDTZ
SDKY
SDKZ
Open
GND
SWOFF
VREG
VREGIF
IREF2
IREF1
IREF0
VROM
SDTA
SDTB
SCKA
SCKB
VCC
PH 0.01 mF
BOOT
FB
OUT2
OUT1
OUT0
SDTY
SDTZ
SCKY
SCKZ
TLC5970
0.01 mF
0.1 mF
Open
GND
SWOFF
VREG
VREGIF
IREF2
IREF1
IREF0
VROM
SDTA
SDTB
SCKA
SCKB
VCC
PH 0.01 mF
BOOT
FB
OUT2
OUT1
OUT0
SDTY
SDTZ
SCKY
SCKZ
TLC5970
Typical Application Circuit Example
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 Incorporated.
2
All other trademarks are the property of their respective owners.
3
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated

TLC5970 Datasheet
TLC5970
SBVS140 – MARCH 2010
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
TLC5970
ORDERING INFORMATION(1)
PACKAGE-LEAD
HTSSOP-32 PowerPAD™(2)
QFN-28 6.0 mm × 6.0 mm
ORDERING NUMBER
TLC5970DAPR
TLC5970DAP
TLC5970RHPR
TLC5970RHPT
TRANSPORT MEDIA,
QUANTITY
Tape and Reel, 2000
Tube, 46
Tape and Reel, 3000
Tape and Reel, 250
(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.
(2) Product preview device.
ABSOLUTE MAXIMUM RATINGS(1)(2)
Over operating free-air temperature range, unless otherwise noted.
Supply voltage
Input voltage
Output voltage
Output current
Electrostatic discharge rating
Operation junction temperature
Storage temperature
VCC
BOOT
BOOT-PH difference
FB
IREF0 to IREF2, SWOFF
SDTA, SDTB, SCKA, SCKB
VROM
PH (steady-state)
PH (transient < 10 ns)
OUT0 to OUT2
SDTY, SDTZ, SCKY, SCKZ
VREG, VREGIF
PH (dc)
PH (peak)
OUT0 to OUT2
SDTY, SDTZ, SCKY, SCKZ
Human body model (HBM) SDTA, SDTB, SCKA, SCKB,
SDTY, SDTZ, SCKY, SCKZ
Human body model (HBM) Other pins
Charged device model (CDM) SDTA, SDTB, SCKA, SCKB,
SDTY, SDTZ, SCKY, SCKZ
Charged device model (CDM) Other pins
TJ (max)
Tstg
VALUE
MIN MAX
–0.3
+40
–0.3
+50
–0.3
+10
–0.3
+18
–0.3 VREG + 0.3
–10 +15
–0.3
+21
–0.6
+40
–1.2
–0.3
+18
–10 +15
–0.3
+6
–800
–2
+180
–35 +35
4
2
1000
500
+150
–55 +150
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
mA
A
mA
mA
kV
kV
V
V
°C
°C
(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.
2 Submit Documentation Feedback
Product Folder Link(s): TLC5970
Copyright © 2010, Texas Instruments Incorporated


Features Datasheet pdf TLC5970 www.ti.com 3-Channel, 12-Bit, PWM LED Driver with Buck DC/DC Converte r and Differential Signal Interface Che ck for Samples: TLC5970 SBVS140 – MA RCH 2010 FEATURES 1 •23 3-Channel, C onstant-Current Sink Output • Current Capability: 150 mA per channel • Gra yscale (GS) Control with PWM: 12-bit (4 096 steps) • Dot Correction (DC): 7-b it (128 steps) • Global Brightness Co ntrol (BC): 7-bit (128 steps) • EEPRO M for Dot Correction Storage • Input Voltage: Up to 36 V • LED Supply Volt age: Up to 17 V with Auto LED Anode Vol tage Control • Constant-Current Accur acy: – Channel-to-Channel = ±0.5% (t yp) – Device-to-Device = ±3% (typ) Data Transfer Rate: 20 MHz • Diffe rential Signal Interface for Long Dista nce Cascading • Unlimited Device Casc ading • Auto Display Repeat/Auto Data Refresh • Internal/External Selectab le GS Clock • Thermal Shutdown (TSD) • Packages: HTSSOP-32 and QFN-28 APP LICATIONS • Full-Color Static LED Displays for Building Wall • Long Distance and Large Area Illuminatio.
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