TLC5949 Datasheet, PDF (1/51 Pages) Texas Instruments – 16-Channel, 12-Bit, ES-PWM, Full Self-Diagnosis LED Driver for 7-Bit Global BC LED Lamp

TLC5949
www.ti.com
SBVS219A – DECEMBER 2012 – REVISED DECEMBER 2012
16-Channel, 12-Bit, ES-PWM, Full Self-Diagnosis LED Driver for
7-Bit Global BC LED Lamp
Check for Samples: TLC5949
FEATURES
1
•2 16 Constant-Current Sink Output Channels
• Sink Current Capability with
Maximum BC Data: 2 mA to 45 mA
• Global Brightness Control (BC):
– 7-Bit (128 Steps) with 25% to 100% Range
• Grayscale Control (GS) with Enhanced
Spectrum or Conventional PWM:
– 12-Bit (4096 Steps)
• LED Power-Supply Voltage: Up to 10 V
• VCC: 3.0 V to 3.6 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 TLC5949 is a 16-channel, constant-current sink
LED driver. Each channel has an individually-
adjustable, pulse width modulation (PWM) grayscale
(GS) brightness control with 4096 steps. All channels
have a 128-step global brightness control (BC). BC
adjusts brightness deviation with other LED drivers.
GS and BC data are accessible with a serial interface
port.
The TLC5949 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
¼
¼
¼
DATA
SCLK
LAT
GSCLK
Controller
R_IREF
Data Read
¼
¼
¼ _OUT0
OUT15
SIN
SCLK
LAT ^{Device 1}
GSCLK
SOUT
VCC
VCC
IREF
GND
R_IREF
3
¼
¼ _OUT0
OUT15
SIN
SCLK
LAT ^{Device n}
GSCLK
SOUT
VCC
VCC
IREF
GND
Typical Application Circuit (Multiple Daisy-Chained TLC5949s)
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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