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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 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 TSSOP (PW) 28 62 mm² 9.7 x 6.4 VQFN (RHB) 32 25 mm² 5 x 5 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
  • 40-mA Capability (Constant Current Sink)
  • 12-Bit (4096 Steps) Grayscale PWM Control
  • 6-Bit (64 Steps) Dot Correction
  • LED Power-Supply Voltage up to 17 V
  • VCC = 3.0 V to 5.5 V
  • Constant Current Accuracy:
    • Channel-to-Channel = ±1% (typ)
    • Device-to-Device = ±2% (typ)
  • 30-MHz Data Transfer Rate
  • 33-MHz Grayscale PWM Clock
  • Extended Serial Interface
  • CMOS Level I/O
  • Schmitt Buffer Input
  • Readable Error Information:
    • Continuous Base LED Open Detection (LOD)
    • Thermal Error Flag (TEF)
  • Noise Reduction:
    • 4-Channel Grouped Delay
  • Operating Temperature: -40°C to +85°C
  • APPLICATIONS
    • Monochrome, Multicolor, Full-Color LED Displays
    • LED Signboards
    • Display Backlighting

PowerPAD is a trademark of Texas Instruments, Inc.

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Description

The TLC5946 is a 16-channel, constant current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant current sink steps for dot correction. The dot correction adjusts the brightness variations between LEDs. Both grayscale control and dot correction are accessible via a serial interface. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5946 has two error information circuits: one for LED open detection (LOD), and a thermal error flag (TEF). LOD detects a broken or disconnected LED during display period. TEF indicates an over-temperature condition.

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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction datasheet (Rev. B) Jun. 23, 2008
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 TLC5946EVM-274 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 (...)

CAD/CAE symbols

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

Ordering & quality

Support & training

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Videos

Dimming Methods: PWM Dimming

In this short on-demand training video, learn the basics of PWM dimming based on three different dimming methodologies, main FET, Series FET and Shunt FET dimmi

Posted: 03-Jan-2018
Duration: 06:43

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