TLC5971 Datasheet, PDF (1/37 Pages) Texas Instruments – 12-Channel 16-Bit, Enhanced Spectrum PWM, RGB LED Driver with 3.3-V Linear Regulator

TLC5971
www.ti.com
SBVS146 – AUGUST 2010
12-Channel, 16-Bit, Enhanced Spectrum, PWM, RGB, LED Driver with
3.3-V Linear Regulator
Check for Samples: TLC5971
FEATURES
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•23 12 Constant-Current Sink Output Channels
• Current Capability: 60 mA per channel
• Grayscale (GS) Control with Enhanced
Spectrum PWM:
16-bit (65536 steps)
• Global Brightness Control (BC):
7-bit (128 steps)
• Power-Supply Voltage Range:
Internal linear regulator: 6 V to 17 V
Direct power supply: 3 V to 5.5 V
• LED Supply Voltage: Up to 17 V
• Constant-Current Accuracy:
– Channel-to-Channel = ±1% (typ)
– Device-to-Device = ±1% (typ)
• Data Transfer Rate: 20 MHz
• Linear Voltage Regulator: 3.3 V
• Auto Display Repeat Function
• Display Timing Reset Function
• Internal/External Selectable GS Clock
• Thermal Shutdown (TSD) with Auto Restart
• Unlimited Device Cascading
• Operating Temperature Range: –40°C to +85°C
APPLICATIONS
• RGB LED Cluster Lamp Displays
DESCRIPTION
The TLC5971 is a 12-channel, constant-current sink
driver. Each output channel has individually
adjustable currents with 65536 PWM grayscale (GS)
steps. Also, each color group can be controlled by
128 constant-current sink steps with the global
brightness control (BC) function. GS control and BC
are accessible via a two-wire signal interface. The
maximum current value for each channel is set by a
single external resistor. All constant-current outputs
are turned off when the IC is in an over-temperature
condition.
Power
Supply
(6 V to 17 V)
VCC
GND
1 mF
GND
VREG
IREF
VCC
OUTR0
OUTG0
1 mF
GND
VREG
IREF
VCC
OUTR0
OUTG0
Controller
DATA
CLK
GND
SDTI
SCKI
OUTG3
OUTB3
SDTO
SCKO
TLC5971
SDTI
SCKI
OUTG3
OUTB3
SDTO
SCKO
TLC5971
NOTE: The number of LEDs in series changes, depending on the VCC voltage.
Typical Application Circuit Example (Internal Linear Regulator Using VCC = 6 V to 17 V)
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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 Incoporated.
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All other trademarks are the property of their respective owners.
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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 © 2010, Texas Instruments Incorporated