TLC694x 16-Channel 32-, 48-Multiplexing 16-Bit ES-PWM Constant-Current LED Driver

1 Features

• Power Supply Voltage Ranges
  • V_CC Voltage Range: 3 V to 5.5 V
  • V_LED Voltage Range: Up to V_CC + 0.3 V
• 16 Constant-Current-Sink Channels
  • 0.3 mA to 25 mA (3 V ≤ V_CC ≤ 5.5 V)
  • Channel Current Deviation: ±1% (typical)
  • Device Current Deviation: ±1% (typical)
  • Low Knee Voltage: 0.3 V (typical) at 10 mA
• 7-Bit (128 Steps) Global Brightness Control (BC)
• 16-Bit (65,536 Steps) Enhanced Spectrum PWM Grayscale Control
• Built-In Memory Supports 32 Multiplexing for TLC6946 and 48 Multiplexing for TLC6948
• LED Display Performance Enhancement
  • Low-Grayscale Uniformity Improvement
  • Low-Grayscale Coupling Issue Elimination
  • Ghosting Removal and Caterpillar Elimination
• High-Speed Serial-Data Interface
  • Data-Shift Clock: 33 MHz (maximum)
  • Grayscale Control Clock: 33 MHz (maximum)
  • Supports Dual-Edge Grayscale Control
• Diagnostics and Protection
  • LED-Open Detection (LOD)
  • IREF Resistor Short Protection (ISP)
  • Thermal Shutdown (TSD)
• Smart Power-Save Mode

2 Applications

• Mono-Color, Multi-Color, Full-Color LED Displays
• High-Refresh-Rate LED Video Displays
• High-Density, Fine-Pitch LED Matrix Displays

3 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 TLC694x 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.

1. For all available packages, see the orderable addendum at the end of the data sheet.