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AL8866 - BUCK AND SEPIC LED CONTROLLER

Datasheet Summary

Description

The AL8866 is a Buck-Boost, Boost, Buck, and SEPIC (single-ended primary-inductance converter) DC-switching controller designed to drive an external MOSFET for high-power LED applications.

The AL8866 operates within a wide input power supply range from 4.7V to 85V.

Features

  • Wide Input Voltage Range from 4.7V to 85V.
  • Pre-Fixed 400kHz Switching Frequency (Factory Set).
  • Spread Spectrum Frequency Modulation for Low EMI.
  • Analog Dimming Range: 1% to 100%.
  • 100% Dimming Level ±3% Current Accuracy.
  • 20% Dimming Level ±12% Current Accuracy.
  • PWM Dimming Ratio 100:1 at 200Hz PWM Frequency.
  • Programmable Soft Start.
  • Fault Status Indicator for Protections.
  • Output Overvoltage and LED Open Circuit Pro.

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Datasheet preview – AL8866

Datasheet Details

Part number AL8866
Manufacturer DIODES
File Size 836.69 KB
Description BUCK AND SEPIC LED CONTROLLER
Datasheet download datasheet AL8866 Datasheet
Additional preview pages of the AL8866 datasheet.

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Full PDF Text Transcription

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AL8866 BUCK-BOOST, BOOST, BUCK AND SEPIC LED CONTROLLER Description The AL8866 is a Buck-Boost, Boost, Buck, and SEPIC (single-ended primary-inductance converter) DC-switching controller designed to drive an external MOSFET for high-power LED applications. The AL8866 operates within a wide input power supply range from 4.7V to 85V. Based on a fixed-frequency, peak current-mode control architecture, the device incorporates spread spectrum frequency modulation and achieves low EMI performance. The AL8866 modulates LED currents with analog or PWM dimming techniques. The analog dimming response, over a 100:1 linear range, is obtained by varying the voltage at the DIM pin. PWM dimming is achieved by directly modulating the same DIM pin with the desired duty cycle.
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