LM3481 是一款适用于开关稳压器的多功能低侧 N-FET 高性能控制器。该器件设计用于升压、SEPIC 和反激式转换器以及需要将低侧 FET 作为初级开关的拓扑。LM3481 器件可以在很高的开关频率下工作，用于减小整体解决方案尺寸。通过使用单个外部电阻器，或将 LM3481 器件与外部时钟同步，可将该器件的开关频率调整为 100kHz 到 1MHz 之间的任意值。除了逐周期电流限制外，电流模式控制还可提供卓越的带宽和瞬态响应。可以使用单个外部电阻器对电流限值进行编程。
LM3481 器件具有内置保护功能，例如热关断、短路保护和过压保护。节能关断模式可以将总电源电流降低至 5µA，并支持电源时序控制。内部软启动会限制启动时的浪涌电流。集成电流斜率补偿可简化设计，如果特定应用需要，可以使用单个电阻器来增加该电流斜率补偿。
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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 (...)
The LM3481 SEPIC evaluation board is designed to provide the design engineer with a fully functional power converter solution with two output voltage options. It produces a selectable output voltage of 12 V at 1.25A or 5V at 3A. The switching frequency for the converter is set to 500 kHz. The (...)
This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
The LM3481 quick start calculator for Flyback topology supports the initial calculation of the power stage and of the necessary external components for a Flyback converter using LM3481 as regulation IC.
The LM3481 Quickstart Calculator for Boost tool supports the initial calculation of the boost power stage and of the necessary external components for a boost converter using LM3481 as regulation IC.
Initial version
The LM3481 quick start calculator for SEPIC tool supports the initial calculation of the SEPIC power stage and of the necessary external components for a SEPIC converter using LM3481 as regulation IC.