TLC6948
- Power Supply Voltage Ranges
- VCC Voltage Range: 3 V to 5.5 V
- VLED Voltage Range: Up to VCC + 0.3 V
- 16 Constant-Current-Sink Channels
- 0.3 mA to 25 mA (3 V ≤ VCC ≤ 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
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.
The TLC694x 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 TLC694x 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 TLC694x device also has an smart power-save mode that sets the total current consumption to 1 mA (typical) when all outputs are off.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TLC694x 16-Channel 32-, 48-Multiplexing 16-Bit ES-PWM Constant-Current LED Driver datasheet (Rev. A) | PDF | HTML | 2019/1/7 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 |
設計與開發
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BOOSTXL-TLC6946EVM — TLC6946 16 通道 32 多工 16 位元 ES-PWM 定電流 LED 驅動器評估模組
BOOSTXL-TLC6948EVM — TLC694x 16 通道 32-48 多工 16 位元 ES-PWM 定電流 LED 驅動器評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SSOP (DBQ) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |