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AL8861 - 40V 1.5A BUCK LED DRIVER

Datasheet Summary

Description

The DIODESTM AL8861 is a hysteresis-mode DC-DC step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage.

Features

  • Low BOM Counts.
  • 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.
  • Recommended Analog Dimming Range: 5% to 100%.
  • Soft-Start.
  • High Efficiency (Up to 97%).
  • LED Short Protection.
  • Inherent Open-Circuit LED Protection.
  • RS Short Protection.
  • Overtemperature Protection (OTP).
  • Up to 1M.

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Datasheet preview – AL8861

Datasheet Details

Part number AL8861
Manufacturer DIODES
File Size 1.23 MB
Description 40V 1.5A BUCK LED DRIVER
Datasheet download datasheet AL8861 Datasheet
Additional preview pages of the AL8861 datasheet.

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Full PDF Text Transcription

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AL8861 40V 1.5A BUCK LED DRIVER Description The DIODESTM AL8861 is a hysteresis-mode DC-DC step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device can operate from an input supply between 4.5V and 40V and provide an externally adjustable output current up to 1A for TSOT25 package and 1.5A for SOT89-5 and MSOP-8EP packages. Depending upon supply voltage and external components, this converter can provide up to 40W of output power. The AL8861 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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