TPS61176
- 2.7-V to 6.5-V VIN Voltage Range
- 2.7-V to 24-V Boost Input Voltage Range
- Integrated 2-A/40-V MOSFET
- 1-MHz Switching Frequency
- Adaptive Boost Output to WLED Voltages
- Six Current Sinks of 35 mA Capability Each
- ±2% (Maximum) Current Accuracy
- 1.3% (Typical) Current Matching
- 100-Hz to 22-kHz Input PWM Frequency
- Mixed Dimming Mode: Automatic Switch Between
Analog Dimming and PWM Dimming- Programmable Switch Point: 25% or 12.5%
- Programmable PWM Dimming Mode: 22-kHz
PWM Dimming, Direct PWM Dimming
- Up to 14-bit Dimming Resolution
- Support Down to 1% Dimming Duty Cycle
- Input PWM Glitch Filter
- Up to 90% Efficiency
- Driver for Input and Output Isolation PFET for
True Shutdown - Built-in WLED Open and Short Protection
- Thermal Shutdown
The TPS61176 is an integrated WLED backlight driver for tablets or notebook PCs using single-cell batteries. It comprises a high-efficiency boost converter with an integrated 2-A, 40-V power MOSFET, and six current sink regulators. The device can drive up to 60 WLEDs. The boost output voltage automatically adjusts to the WLED forward voltage to improve efficiency.
The TPS61176 supports mixed dimming mode. The automatic switch between PWM dimming and analog dimming increases the overall electrical-to-optical efficiency, reducing power of the backlight significantly. The switch point can be programmed to 12.5% or 25%. PWM dimming mode can also be programmed to fixed frequency dimming or direct PWM dimming. The device supports up to 14-bit dimming resolution to avoid potential flickering during low brightness dimming.
True shutdown is supported with a driver for an external isolation P-channel MOSFET. When the device is disabled or the boost output is shorted to ground, the isolation PFET is turned off to cut off the power path from battery preventing any leakage current from the battery. The device also integrates soft start, thermal shutdown, WLED open and short protection. Its 16-pin WQFN package provides a space-saving and high-performance WLED driver solution.
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 | TPS61176 High-Efficiency 6-Channel WLED Driver Supporting Single-Cell Li-Ion Battery Input datasheet (Rev. B) | PDF | HTML | 2015/8/27 | ||
| 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 | ||||
| 使用指南 | TPS61176EVM-566 User's Guide | 2013/12/5 |
設計與開發
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TPS61176EVM-566 — 支援單節鋰離子電池輸入的高效率六通道 WLED 驅動器評估模組
The Texas Instruments TPS61176EVM-566 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS61176 , which are multi-channel WLED drivers providing highly integrated solutions for tablet or notebook PCs, which can support single-cell battery input directly. The EVM (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。