LM25066A
- Input Voltage Range: 2.9 V to 17 V
- I2C/SMBus Interface and PMBus Compliant Command Structure
- Programmable 25-mV or 46-mV Current Limit Threshold
- Configurable Circuit Breaker Protection for Hard Shorts
- Configurable Undervoltage and Overvoltage Lockouts With Hysteresis
- Remote Temperature Sensing With Programmable Warning and Shutdown Thresholds
- Detection and Notification of Damaged MOSFET Condition
- Real Time Monitoring of VIN, VOUT, IIN, PIN, VAUX With 12-Bit Resolution and 1-kHz Sampling Rate
- Current Measurement Accuracy: ±1% Over Temperature
- Power Measurement Accuracy: ±2% Over Temperature
- True Input Power Measurement Using Simultaneous Sampling of VIN and IIN Accurately Averages Dynamic Power Readings
- Averaging of VIN, IIN, PIN, and VOUT Over Programmable Interval Ranging from 0.001 to 4 Seconds
- Programmable WARN and FAULT Thresholds with SMBA Notification
- Black Box Capture of Telemetry Measurements and Device Status Triggered by WARN or FAULT Condition
- 24-Lead WQFN Package
The LM25066A combines a high-performance hot-swap controller with a PMBus™ compliant SMBus/I2C interface to accurately measure, protect and control the electrical operating conditions of computing and storage blades connected to a backplane power bus. The LM25066A continuously supplies real-time power, voltage, current, temperature and fault data to the system management host via the SMBus interface.
The LM25066A control block includes a unique hot-swap architecture that provides current and power limiting to protect sensitive circuitry during insertion of boards into a live system backplane, or any other power source. A fast acting circuit breaker prevents damage in the event of a short circuit on the output. The input undervoltage and overvoltage levels and hysteresis are configurable, as well as the insertion delay time and fault detection time. A temperature monitoring block on the LM25066A interfaces with a low-cost external diode for monitoring the temperature of the external MOSFET or other thermally sensitive components. The POWER GOOD output provides a fast indicator when the input and/or output voltages are outside their programmed range. LM25066A current measurement accuracy is ±1% over temperature.
The LM25066A monitoring block computes both the real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) as well as the peak power. Accurate power averaging is accomplished by averaging the product of the input voltage and current. A black box (Telemetry/Fault Snapshot) function captures and stores telemetry data and device status in the event of a warning or a fault.
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 | LM25066A System Power Management and Protection IC With PMBus™ datasheet (Rev. G) | PDF | HTML | 2016/11/11 | ||
| 應用說明 | Basics of Power Switches (Rev. A) | PDF | HTML | 2019/4/26 | |||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 技術文章 | Simplify digital hot swap design using the PI-Commander GUI | PDF | HTML | 2016/6/6 | |||
| 應用說明 | Robust Hot Swap Design (Rev. A) | 2015/4/8 |
設計與開發
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SNVR505 — LM25066 Design Calculator With FET Recommendation
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PMP10896 — 適用於企業乙太網路交換器的完整 PMBus 電源系統參考設計
完整的 PMBus 電源系統，適用於 3 ASIC/FPGA 核心、DDR3 核心記憶體，以及高性能乙太網路交換器上常見的輔助電壓。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (NHZ) | 24 | 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。