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AL8843 - 40V 3A STEP-DOWN LED DRIVER

Description

The DIODES™ AL8843 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

  • Wide Input Voltage Range: 4.5V to 40V.
  • Output Current up to 3A.
  • Internal 40V NDMOS Switch.
  • Typical 4% Output Current Accuracy.
  • Single Pin for On/Off and Brightness Control by DC Voltage or PWM Signal.
  • Recommended Analog Dimming Range: 10% to 100%.
  • Soft-Start.
  • High Efficiency (Up to 97%).
  • LED Short Protection.
  • Inherent Open-Circuit LED Protection.
  • Over Temperature Protection (OTP).
  • Up to 1MHz Switching Frequency.
  • SO-8EP Package Ava.

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Datasheet preview – AL8843

Datasheet Details

Part number AL8843
Manufacturer DIODES
File Size 1.36 MB
Description 40V 3A STEP-DOWN LED DRIVER
Datasheet download datasheet AL8843 Datasheet
Additional preview pages of the AL8843 datasheet.

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Full PDF Text Transcription

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AL8843 40V 3A STEP-DOWN LED DRIVER Description The DIODES™ AL8843 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 3A. Depending upon supply voltage and external components, this converter can provide up to 60W of output power. The AL8843 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 CTRL pin. The CTRL pin will accept either a DC voltage signal or a PWM signal.
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