REFD4389, Supply-Chopped Dimming Control Boosts LED Driver Efficiency and Keeps Inrush Currents to a Minimum

Reference Design using part MAX16834 by Analog Devices

Manufacturer

Analog Devices
  • Application Category
    Lighting
  • Product Type
    Dimming LED Driver

Associated Documents

For End Products

  • LED Lighting

Description

  • REFD4389, LED Driver Reference design drives a 700mA constant current to a single string of LEDs with forward voltages up to 60V. The design allows PWM dimming based on supply chopping. The input power supply is chopped on and off at 300Hz to 1kHz frequency to achieve LED brightness control. The driver uses a fixed-frequency boost converter, controlled by the MAX16834 LED driver. This unique reference design limits the input inrush current to negligible levels without compromising either the input or output filtering

Key Features

  • Input Voltage
    24 V
  • Output Voltage
    60 V
  • Output Current
    0.7 A

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