LMR38020
- Functional Safety-Capable
- Configured for rugged industrial
applications
- 4.2-V to 80-V input voltage range
- 2-A continuous output current
- Ultra-low 40-µA operating quiescent current
- > 1.5-mm distance between VIN and GND pin
- 200-kHz to 2.2-MHz adjustable switching frequency
- Frequency synchronization to external clock
- Spread spectrum option for reduced EMI
- 97% maximum duty cycle
- Support start-up with pre-biased output
- ±1.0% tolerance voltage reference at room temperature
- Precision enable
- Easy to use device with integrated compensation network enabling low BOM count
- Integrated synchronous rectification
- 8-pin HSOIC with PowerPAD™ integrated circuit package
- PFM and forced PWM (FPWM) options
- Available in 1-A, LMR38010
- Create a custom design using the LMR38020 with the WEBENCH Power Designer
The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.
The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.
The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in an 8-pin HSOIC PowerPAD integrated circuit package.
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 | LMR38020 4.2-V to 80-V, 2-A, Synchronous SIMPLE SWITCHER Power Converter with 40-µA IQ datasheet (Rev. E) | PDF | HTML | 2023/9/18 | ||
| 應用說明 | Designing an Isolated Buck Converter using the LMR38020 | PDF | HTML | 2023/8/30 | |||
| 應用說明 | Auxiliary Power Supply Design Based on LMR38020 Fly-Buck in Solar Micro Inverter | PDF | HTML | 2023/8/29 | |||
| 功能安全資訊 | LMR380x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2021/11/2 |
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)。
LMR38020EVM — 具 40-uA IQ 的 LMR38020 評估模組 SIMPLE SWITCHER 80-V、2-A、2.2-MHz 降壓轉換器
LMR38020QEVM — LMR38020-Q1 評估模組 SIMPLE SWITCHER® 電源轉換器 80-V、2-A 同步降壓 40-µA IQ
LMR38020-DESIGN-CALC — LMR38020 快速入門設計計算機
TIDA-010950 — 具有功率調節和霍爾效應位置感測功能的阻尼器與 EEV 控制器參考設計
此參考設計展示了阻尼器致動器與電子膨脹閥的雙馬達驅動解決方案。多重馬達驅動包含一個雙極步進馬達驅動器、一個由 15VDC 來源運作的無刷 DC 馬達驅動器。此設計顯示出精確的功率限制，有助於輕鬆鑑定為由 IEC 60335-1 定義的低功率電路。此參考設計整合 0-10V 和 4-20mA 控制介面，可控制閥門或阻尼器位置，以及用於精確位置感測的 TMAG5273。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | 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。