AL8808中文资料medium-voltage-dc-dc-led-drivers数据手册Diodes规格书

描述 Description

The AL8808 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 30V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8808 switches at frequency up to 1MHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AL8808 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming. It is available in TSOT25.

特性 Features

LED Driving Current Up to 1A
Better Than 5% Accuracy
High Efficiency Up to 96%
Fast Controlled Falling Edges 7ns
Operating Input Voltage from 6V to 30V
High Switching Frequency Up to 1MHz
PWM/DC Input for Dimming Control
Built-In Output Open-Circuit Protection
Built-In Over-Temperature Protection
TSOT25: Available in “Green” Molding Compound (No Br, Sb) - Totally Lead-Free & Fully RoHS Compliant - Halogen and Antimony Free. “Green” Device

应用 Application

MR16 Lamps
General Illumination Lamps

简介

AL8808属于开发板套件编程器的评估板-LED驱动器。由制造生产的AL8808评估板 - LED 驱动器LED 驱动器评估板是带有元器件的电路板，用于提供特定电路或器件的工作实例。该系列评估板提供一个 LED 驱动器实例，用于可调节闪烁、模拟亮度、背光、双极开关、升压转换器、亮度控制、相机闪光灯、可调光、恒流和 RGB 控制，以及更多其他应用。