应用与设计

低电平有效上电复位定时器 (1s POR)

详情介绍

概览

产品详情

A 34W LED Driver With Robust Output Short-Circuit Protection

图中示出了将 LT3796 配置为一款升压转换器的情形,其可在宽输入范围内驱动一个 34W LED 灯串。在低输入电压条件下对 LED 电流进行降额,以避免外部功率组件出现过热。前端电流检测放大器通过把输入电流转换为 CSOUT 引脚上的一个电压信号来监视输入电流。FB1 引脚上的电阻器网络负责提供 OPENLED 保护功能,此项功能可限制输出电压并防止 ISP 引脚、ISN 引脚及多个外部组件超过其最大额定值。

工具及仿真模型

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice