用于 LCD 显示器的三路输出电源 (5V、15V、-10V)
详情介绍
概览
产品详情
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LTC3783 是一款电流模式 LED 驱动器及升压、反激和 SEPIC 型控制器,用于驱动一个 N 沟道功率 MOSFET 和一个 N 沟道负载 PWM 开关。当采用一个外部负载开关时,PWMIN 输入不仅驱动 PWMOUT,而且还将使能控制器 GATE 开关和误差放大器操作,可使控制器在 PWMIN 为低电平时存储负载电流信息。该功能 (正在进行专利审议) 实现了速度极快、真正的 PWM 负载开关操作,而不会发生瞬态过压或欠压问题;3000:1 的 LED 调光比可以通过数字方式来实现,从而避免了采用 LED 电流调光时常见的彩色偏移现像。FBP 引脚提供了负载电流的仿真调光,因此,与仅采用 PWM 的时候相比,有效调光比增加了 100:1。
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.
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