現在提供此產品的更新版本
功能相同，但針腳輸出與所比較的裝置不同。
LM3481
- 10-Lead VSSOP package
- Internal push-pull driver with 1A peak current capability
- Current limit and thermal shutdown
- Frequency compensation optimized with a capacitor and a resistor
- Internal soft start
- Current mode operation
- Adjustable undervoltage lockout with hysteresis
- Pulse skipping at light loads
- Key specifications
- Wide supply voltage range of 2.97V to 48V
- 100kHz to 1MHz Adjustable and synchronizable clock frequency
- ±1.5% (over temperature) internal reference
- 10µA shutdown current (over temperature)
- Create a custom design using the LM3481 with the WEBENCH Power Designer
The LM3481 device is a versatile Low-Side N-FET high-performance controller for switching regulators. The device is designed for use in boost, SEPIC and flyback converters and topologies requiring a low-side FET as the primary switch. The LM3481 device can be operated at very high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481 device can be adjusted to any value between 100kHz and 1MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response in addition to cycle-by-cycle current limiting. Current limit can be programmed with a single external resistor.
The LM3481 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing. Internal soft start limits the inrush current at start-up. Integrated current slope compensation simplifies the design and, if needed for specific applications, can be increased using a single resistor.
技術文件
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)。
LM3481-FLYBACKEVM — 適用於 LM3481 升壓控制器的隔離返馳拓撲評估模組
LM3481EVAL — 具有 12V 輸出的高效率升壓開關控制器評估板
The LM3481 is a current mode, low side N channel FET controller. It can be utilized in numerous configurations including a Boost, Flyback or SEPIC (Single Ended Primary Inductor Converter). This evaluation board demonstrates the flexibility of the LM3481 in a boost topology providing 12 volt output (...)
FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator
此工具協助電源供應工程師根據規格選擇正確的隔離式 DC-DC 拓撲結構。根據選擇的拓撲結構，計算機還會推薦適合設計的 IC。
LM3481-BOOST-CALC — LM3481 Quickstart Calculator for Boost
LM3481-FLYBACK-CALC — LM3481 quick start calculator for Flyback
LM3481-SEPIC-CALC — LM3481 quick start calculator for SEPIC
許多 TI 參考設計包含 LM3481
使用我們的參考設計選擇工具，以檢視並找出最適合您的應用和參數的設計。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 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。