LM251772
- Input range from 3.5V to 36V
- Dynamical Vo
programming via I2C from:
- 3.3V up to 48V in 20mV steps
- 1V up to 24V in 10mV steps
- Peak current regulation control
- Small voltage transition ripple over all operating modes
- Shut down quiescent current 3µA
- Operating quiescent current 60µA
- Drive (DRV) pin for dual role port power path
- Push-Pull output for fast pMOS FET control
- Configurable as charge pump driver stage for nMOS FET
- Operation mode selection for high efficiency in
light load and high load conditions:
- Power save mode (Single Pulse/µSleep)
- Automatic conduction mode
- Integrated high voltage supply LDO
- Auxiliary high voltage LDO for PD-controller supply
- Integrated full-bridge gate drive
- 2A peak current capability
- Bootstrap over and under-voltage protection
- Integrated boot-strap diode
- Fixed frequency independent from operating mode
(boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching frequency from 100kHz to 600kHz
- External clock synchronization and clock output
- Average input or output current sensor
- Programmable from 0.5A to 7A in 50mA steps
- I2C Interface readout of monitoring features
- Commercial temperature range (Tj = 0°C to 70°C)
-
Create a custom design using the LM251772 with the WEBENCH® Power Designer
The LM251772 is a four switch Buck-Boost controller. It provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power save mode the device supports very high efficiency over the complete operation range of the output. The output voltage and average current can be dynamically programmed via the integrated I2C interface. The configuration range for output voltage and average current meet the USB-PD standard requirements. The integrated DRV pin can control a disconnect FET to support dual role port (DRP) requirements.
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 | LM251772 36V VIN 4-Switch Buck-Boost Controller with I2 C for USB-PD Sourcing datasheet (Rev. A) | PDF | HTML | 2025/2/6 | ||
| Application brief | Using the DRV1 Pin on LM51772 and LM251772 | PDF | HTML | 2025/7/29 | |||
| 證書 | LM251772EVM-PD EU Declaration of Conformity (DoC) | 2025/2/20 | ||||
| 應用說明 | Layout Optimization of 4-Switch Buck-Boost Converters | PDF | HTML | 2023/9/5 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
LM251772EVM-PD — LM251772 評估模組
LM51772EVM-HP — LM51772 評估模組
LM51772EVM-HP 展示使用 LM51772 wide-VIN 降壓升壓控制器的靈活高功率降壓升壓設計。評估模組設定為在 9V 至 48V 輸入電壓範圍內運作，並且提供最高 5A 負載電流的穩壓 20V 輸出。
USB2ANY — USB2ANY 介面轉接器
USB2ANY 介面轉接器是一種工具，可讓電腦透過 USB 連線控制評估模組 (EVM)。USB2ANY 支援多種常用的通訊協定介面，並提供 3.3V 與 5V 的電源供應器。
LM251772-QUICKSTART-CALC — LM251772 BuckBoost Quickstart Calculator Tool
PMP31344 — 車用、12V 輸入、140W 雙埠 USB 電力傳輸，支援 DisplayPort™ ALT 模式參考設計
此參考設計為車用 USB 擴充功率範圍 (EPR) 系統，可為兩個 USB Type-C® 埠同時提供電源與數位通訊功能。連接 USB-C 纜線時，TPS26744E-Q1 會與插入式裝置協商目標輸出電壓和最大電流。接著控制器會啟用並適當驅動處理電力傳輸的降壓升壓控制器 (LM251772)。
在通訊端，TPS26744E-Q1 可與連接的 USB 裝置（例如手機或筆記型電腦）協商 USB-DP 模式的選擇。接著，顯示器強制轉型則可透過 USB 多工器 (MUX) (TUSB564-Q1)、DP MUX (TS3DV642) 及平板顯示器 (FPD)-Link 序列器啟用。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHA) | 40 | 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。