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SBVS146 – AUGUST 2010
12-Channel, 16-Bit, Enhanced Spectrum, PWM, RGB, LED Driver with
3.3-V Linear Regulator
Check for Samples:
1
FEATURES
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
Power
Supply
(6 V to 17 V)
VCC
GND
APPLICATIONS
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RGB LED Cluster Lamp Displays
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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.
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GND
1
mF
VREG
IREF
VCC
OUTR0
OUTG0
1
mF
GND
VREG
IREF
VCC
OUTR0
OUTG0
¼
¼
¼
OUTG3
Controller
DATA
CLK
GND
SDTI
SCKI
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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2
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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.
All other trademarks are the property of their respective owners.
Copyright © 2010, Texas Instruments Incorporated
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.
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TI [ TEXAS INSTRUMENTS ]
