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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | TPS61176 High-Efficiency 6-Channel WLED Driver Supporting Single-Cell Li-Ion Battery Input 数据表 (Rev. B) | PDF | HTML | 2015-8-27 | ||
| 白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020-9-21 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 用户指南 | TPS61176EVM-566 User's Guide | 2013-12-5 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
TPS61176EVM-566 — 支持单节锂离子电池的高效 6 通道 WLED 驱动器输入评估模块
德州仪器 (TI) 的 TPS61176EVM-566 评估模块 (EVM) 可帮助设计人员评估 TPS61176 多通道 WLED 驱动器的作用和性能。该驱动器针对平板电脑和笔记本电脑提供高度集成的解决方案，可直接支持单节蓄电池输入。该 EVM 支持在 2.7 V-6.5 V 的输入电压源范围内的电压下工作，并可为 6 通道 LED 提供最高 125 mA 的输出电流。对于单通道，如果采用 TI 的 WLEDEVM-260（WLED 负载板），则可使用 10 到 12 个串联的 LED。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| WQFN (RTE) | 16 | Ultra Librarian |
订购和质量
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