Product details


Features Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power Good, Thermal Shutdown Analog dimming steps 128 Data transfer rate (Typ) (MHz) 30 Ch to ch accuracy (Typ) (+/- %) 1.5 Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other Signage LED display drivers

Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 4.40 x 9.70 VQFN (RHB) 32 25 mm² 5.0 x 5.0 open-in-new Find other Signage LED display drivers


  • 16 Channels, Constant Current Sink Output
  • 50-mA Capability (Constant Current Sink)
  • 16-Bit (65,536 Steps) Grayscale Control with Enhanced Spectrum (ES) PWM
  • 7-Bit (128 Steps) Global Brightness Control for All Channels with Sink Current
  • LED Power-Supply Voltage up to 17 V
  • VCC = 3.0 V to 5.5 V
  • Constant Current Accuracy:
    • Channel-to-Channel = ±1.5%
    • Device-to-Device = ±3%
  • CMOS Level I/O
  • 30-MHz Data Transfer Rate
  • 33-MHz Grayscale Control Clock
  • Auto Display Repeat
  • Auto Data Refresh
  • Continuous Base LED Open Detection (LOD):
    • Detect LED opening and LED short to GND during display
  • Thermal Shutdown (TSD):
    • Automatic shutdown at high temperature conditions
    • Restart under normal temperature
  • Readable Error Information:
    • LED Open Detection (LOD)
    • Thermal Error Flag (TEF)
  • Noise Reduction:
    • 4-channel grouped delay to prevent inrush current
  • Operating Temperature: –40°C to +85°C
    • Monochrome, Multicolor, Full-Color LED Displays
    • LED Signboards
    • Display Backlighting

PowerPAD is a trademark of Texas Instruments, Inc.
All other trademarks are the property of their respective owners.

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The TLC5943 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 65,536 enhanced spectrum pulse-width modulated (PWM) steps controlled by grayscale (GS) data. All output drivers are adjustable with 128 constant sink current steps at same value controlled by brightness control (BC) data. Both GS data and BC data are writable via a serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5943 has two error detection circuits for LED open detection (LOD) and a thermal error flag (TEF). LOD detects a broken or disconnected LED and shorted LED to GND during the display period. TEF indicates an over-temperature condition; when a TEF is set, all output drivers are turned off. When the TEF is cleared, all output drivers are restarted.

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Technical documentation

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Type Title Date
* Datasheet 16-Channel, 16-Bit PWM LED Driver with 7-Bit Global Brightness Control datasheet Dec. 11, 2007
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 2014
User guides TLC5943EVM-274 User's Guide Jan. 23, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

TLC594x Family Evaluation Software
TLC594XEVM-SW The TLC594x Graphical User Interface (GUI) allows users to change colors and interact with the TLC594x board. The program can be used with or without the board attached.
  • Color Picker: Useful in selecting colors for the LED Frames
  • Brightness Control: Used to control the brightness of the red, green and blue of the colors in the LED Frames
  • LED Patterns: When the board is connected, the color patterns can be changed
  • Timing Control: Controls the timing of the colors in the (...)

Design tools & simulation

SLIM271.ZIP (48 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 28 View options
VQFN (RHB) 32 View options

Ordering & quality

Support & training

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