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Product details

Parameters

Features Dot Correction, 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 64 Data transfer rate (Typ) (MHz) 30 Ch to ch accuracy (Typ) (+/- %) 1 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

Features

  • 16 Channels, Constant Current Sink Output
  • 60-mA Capability (Constant Current Sink)
  • 12-Bit (4096 Steps) Grayscale Control with PWM
  • 6-Bit (64 Steps) Dot Correction with Sink Current
  • Internal Pre-Charge FET to Prevent LED Ghosting Phenomenon on Multiplexed LED Systems
  • LED Power-Supply Voltage up to 15 V
  • VCC = 3.0 V to 5.5 V
  • Constant Current Accuracy:
    • Channel-to-Channel = ±1%
    • Device-to-Device = ±3%
  • CMOS Logic Level I/O
  • 30-MHz Data Transfer Rate
  • 33-MHz Grayscale Control Clock
  • Continuous Base LED Open Detection (LOD):
    • Detect LED opening and LED short to GND during display with auto output off function
  • Thermal Shutdown (TSD):
    • Automatic shutdown at over-temperature conditions
    • Restart under normal temperature
  • Pre-Thermal Warning (PTW):
    • High temperature operation alert
  • Readable Error Information:
    • LED Open Detection (LOD)
    • Thermal Error Flag (TEF)
    • Pre-Thermal Warning (PTW)
  • Noise Reduction:
    • 4-channel grouped delay to prevent inrush current
  • Operating Temperature: -40°C to +85°C
  • APPLICATIONS
    • Monochrome, Multicolor, Full-Color LED Displays Using Multiplexing System
    • LED Signboards Using Multiplexing System

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Description

The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC) adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the TEF is set, all output drivers are turned off by the thermal shutdown (TSD) protection. Additionally, when the TEF is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature condition. The output drivers remain on when PTW is set.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET datasheet (Rev. A) Jul. 07, 2009
White papers Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
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 TLC5944EVM-358 User's Guide Apr. 15, 2009

Design & development

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

Software development

SUPPORT SOFTWARE Download
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.
Features
  • 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

SIMULATION MODELS Download
SLIM263.ZIP (51 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

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

Ordering & quality

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