TLC6946 16-Channel, 16-Bit ES-PWM Constant-Current LED Driver | TI.com

TLC6946 (PREVIEW)

16-Channel, 16-Bit ES-PWM Constant-Current LED Driver

16-Channel, 16-Bit ES-PWM Constant-Current LED Driver - TLC6946
 

Sample Availability

Prototype samples are available (PTLC6946DBQR). Order Now

Description

In high-density, fine-pitch LED panel applications, the performance demand for multi-channel LED drivers is increasing to achieve high multiplexing, high PWM resolution, and high refresh rates. To meet strict display quality requirements, the LED drivers must have the ability to solve various issues in different LED-matrix application scenarios.

The TLC6946 device is a 16-channel, constant-current-sink LED driver. Each channel has an individually adjustable 65 536 steps of PWM grayscale control. The maximum constant-current value of all 16 channels is set by a single external resistor with 128 steps of global brightness control from 0.3 mA to 25 mA.

The TLC6946 device integrates enhanced circuits to solve the various display issues in fine-pitch LED display applications: the low-grayscale uniformity issue, coupling issue, ghosting issue, and caterpillar issue.

The TLC6946 device features an LED-open detection function, and the error detection results can be read via a serial data interface port. Thermal shutdown and IREF resistor short protection ensure a higher system reliability. The TLC6946 device also has an smart power-save mode that sets the total current consumption to 0.8 mA (typ) when all outputs are off.

Features

  • Power Supply Voltage Range
    • VCC Voltage Range: 3 V to 5.5 V
    • VLED Voltage Range: Up to 17 V
  • 16 Constant-Current-Sink Channels
    • 0.3 mA to 25 mA (3 V ≤ VCC ≤ 5.5 V)
    • Channel Current Deviation: ±1.5% (typ)
    • Device Current Deviation: ±1.5% (typ)
    • Low Knee Voltage: 0.3 V (typ) at 10 mA
  • 7-Bit (128 Steps) Global Brightness Control (BC)
  • 16-Bit (65 536 Steps) Enhanced Spectrum PWM Grayscale Control
  • Built-In 16-Kbit Memory Supports 32-Multiplexing
  • LED Display Performance Enhancement
    • Low-Grayscale Uniformity Improvement
    • Low-Grayscale Coupling Issue Elimination
    • Ghosting Removal
    • Caterpillar Elimination
  • High-Speed Serial-Data Interface
    • Data-shift Clock: 33 MHz (max)
    • Grayscale Control Clock: 33 MHz (max)
    • Extended Grayscale Control: 50 MHz (max)
  • Diagnostics and Protection
    • LED-Open Detection (LOD)
    • IREF Resistor Short Protection (ISP)
    • Thermal Shutdown (TSD)
  • Smart Power-Save Mode

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Parametrics Compare all products in Signage LED display drivers

 
Features
Analog Dimming Steps
Data Transfer Rate (Typ) (MHz)
Ch to Ch Accuracy (Typ) (+/- %)
Rating
Operating Temperature Range (C)
Pin/Package
TLC6946 TLC59283 TLC59482 TLC5948A TLC5957 TLC59581 TLC59582
Fault Detection
LED Open Detection
PWM LED Driver
Pre-Charge FET
Thermal Shutdown    
ON/OFF LED Driver
Pre-Charge FET    
PWM LED Driver     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    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Thermal Shutdown    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Pre-Charge FET    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Thermal Shutdown    
128       64     128     512     512     512    
33     35     33     33     33     25     25    
1.5     1     1     1.5     1     1     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
24SSOP     24SSOP
24VQFN    
24SSOP     24HTSSOP
24SSOP    
56QFN     56QFN     56QFN