TPS61151
- 2.5-V to 6-V Input Voltage Range
- Two Outputs Each up to 27 V
- 0.7-A Integrated Switch
- Built-In Power Diode
- 1.2-MHz Fixed PWM Frequency
- Individually Programmable Output Current
- Input-to-Output Isolation
- Built-In Soft Start
- Overvoltage Protection
- Up to 83% Efficiency
- Up to 30-kHz PWM Dimming Frequency
The TPS6115x is a high-frequency boost converter with two regulated current outputs for driving WLEDs. Each current output can be individually programmed through external resistors. There is a dedicated selection pin for each output so the two outputs can be turned on separately or simultaneously. The output current can be reduced by a pulse width modulation (PWM) signal on SEL pins or an analog voltage on the ISET pins, resulting in PWM dimming of the WLEDs. The boost regulator runs at a 1.2-MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with pulse frequency modulation (PFM) control.
The two current outputs are ideal for driving WLED backlights for the sub and main displays in clamshell phones. The two outputs can also be used for driving display and keypad backlights. When used together, the two outputs can drive up to 14 WLEDs for one large display.
In addition to the small inductor, small capacitor, and 3-mm × 3-mm VSON package, the built-in MOSFET and diode eliminate the need for any external power devices. Overall, the device provides an extremely compact solution with high efficiency and plenty of flexibility.
For all available packages, see the orderable addendum at the end of the data sheet.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 | TPS6115x Dual-Output Boost WLED Driver Using Single Inductor datasheet (Rev. E) | PDF | HTML | 2015/11/30 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 應用說明 | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018/12/11 | ||||
| 應用說明 | Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) | 2017/11/29 | ||||
| 應用說明 | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 2017/6/15 | ||||
| 應用說明 | Analog PWM Dimming in White-LED Drivers | 2016/12/21 | ||||
| 類比設計期刊 | IQ: What it is, what it isn’t, and how to use it | 2011/6/17 | ||||
| 應用說明 | Minimizing Ringing at the Switch Node of a Boost Converter | 2006/9/15 |
設計與開發
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TPS61150EVM-150 — TPS61150EVM 評估模組
TPS61150EVM-150 是 TPS6115x 系列的評估工具。這是具有兩個穩壓電流輸出的雙通道、單電感器升壓轉換器，用於驅動白光 LED。每個電流輸出可透過外部電阻器單獨編程，並可驅動 6 至 7 白光 LED（3.5V 或 4V 正向電壓），總共最多可達 12 或 14 個 LED。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (DRC) | 10 | 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。