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AL8861Q - HIGH EFFICIENCY 40V 1.5A AUTOMOTIVE GRADE BUCK LED DRIVER

Description

The AL8861Q is a hysteresis mode DC-DC step-down LED driver, designed for driving single or multiple series of the connected LEDs efficiently from a voltage source higher than the LED voltage.

Features

  • Wide Input-Voltage Range: 4.5V to 40V.
  • Output Current Up to 1.5A.
  • Internal 40V NDMOS Switch.
  • Typical 5% Output Current Accuracy.
  • Single Pin for On/Off and Brightness Control by DC Voltage or PWM Signal.
  • High Efficiency (> 95%).
  • LED Short-Circuit Protection.
  • Inherent Open-Circuit LED Protection.
  • Sense Resistor Short-Circuit Protection.
  • Overtemperature Shutdown.
  • Up to 1MHz Switching Frequency.
  • Pb-Free MSOP-8EP Package.
  • Totally Lead-.

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Full PDF Text Transcription

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AL8861Q HIGH EFFICIENCY 40V 1.5A AUTOMOTIVE GRADE BUCK LED DRIVER Description The AL8861Q is a hysteresis mode DC-DC step-down LED driver, designed for driving single or multiple series of the connected LEDs efficiently from a voltage source higher than the LED voltage. The device can operate with an input supply from 4.5V to 40V and provide an externally adjustable output current up to 1.5A for the MSOP-8EP package. Depending upon supply voltage and external components, this converter can provide up to 40W of output power. The AL8861Q integrates the power switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Dimming can be realized by applying an external control signal to the VSET pin.
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