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A8509 Datasheet High Efficiency 4-Channel Fault Tolerant LED Driver

Manufacturer: Allegro MicroSystems

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General Description

The A8509 is a multi-output white LED driver for backlighting LCD panels.

It integrates a current-mode boost controller and four individual current sinks.

The boost controller architecture allows for significant scaling of boost voltage to optimize the solution for the required number of LEDs per string.

Overview

A8509 Wide Input Voltage Range, High Efficiency 4-Channel Fault Tolerant LED.

Key Features

  • Four integrated high current sinks for LED strings; can be tied together for even higher currents.
  • Fixed frequency current mode control with integrated gate driver / boost controller; powerful gate driver to drive an external N-channel MOSFET allows significant scaling capability on the number of LEDs per string.
  • Parallel operation with one boost controller (master) and up to three additional slave controllers; can run up to 16 strings of LEDs while populating only a.

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