TLC5951
- 24-Channel Constant-Current Sink Output
- Current Capability: 40 mA
- Selectable Grayscale (GS) Control With PWM:
12-Bit (4096 Step), 10-Bit (1024 Step), 8-Bit (256 Step) - Three Independent Grayscale Clocks for Three Color Groups
- Dot Correction (DC): 7-Bit (128 Step)
- Global Brightness Control (BC) for Each Color Group: 8-Bit (256 Step)
- Auto Display Repeat Function
- Independent Data Port for GS and BC and DC Data
- Communication Path Between Each Data Port
- LED Power-Supply Voltage up to 15 V
- VCC = 3 V to 5.5 V
- Constant-Current Accuracy:
- Channel-to-Channel = ±1.5%
- Device-to-Device = ±3%
- CMOS Logic Level I/O
- Data Transfer Rate: 30 MHz
- 33-MHz Grayscale Control Clock
- Continuous Base LED-Open Detection (LOD)
- Continuous Base LED-Short Detection (LSD)
- Thermal Shutdown (TSD) With Auto Restart
- Grouped Delay to Prevent Inrush Current
- Operating Ambient Temperature: –40°C to 85°C
- Packages: HTSSOP-38, QFN-40
The TLC5951 device is a 24-channel, constant-current sink driver. Each channel has an individually-adjustable, 4096-step, pulse-width modulation (PWM) grayscale (GS) brightness control and 128-step constant-current dot correction (DC). The dot correction adjusts brightness deviation between channels and other LED drivers. The output channels are grouped into three groups of eight channels. Each channel group has a 256-step global brightness control (BC) function and an individual grayscale clock input.
GS, DC, and BC data are accessible via a serial interface port. DC and BC can be programmed via a dedicated serial interface port.
The TLC5951 device has three error-detection circuits for LED-open detection (LOD), LED-short detection (LSD), and thermal error flag (TEF). LOD detects a broken or disconnected LED, LSD detects a shorted LED, and TEF indicates an overtemperature condition.
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 | TLC5951 24-Channel, 12-Bit PWM LED Driver With 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control datasheet (Rev. E) | PDF | HTML | 2017/7/27 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 應用說明 | Using the TLC5951 for Keyboard Backlighting | 2015/4/14 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (DAP) | 38 | Ultra Librarian |
| WQFN (RTA) | 40 | Ultra Librarian |
| VQFN (RHA) | 40 | Ultra Librarian |
訂購與品質
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