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Maxim Integrated 6-Channel High-Brightness LED Driver | New Product Brief

January 15, 2020 by Mouser Electronics

This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.

Maxim Integrated 6-Channel High-Brightness LED Driver

Maxim Integrated’s MAX20056B is a 6-channel high-brightness LED driver providing high efficiency and robust performance for automotive displays. The MAX20056B integrates a current-mode switching DC-DC controller to drive the LED strings and operates from a wide 4.5V to 42V input, with tolerance to 52V load dump transients. 

The controller supports boost, SEPIC, or coupled-inductor buck-boost topologies with a 400kHz to 2.2MHz programmable switching frequency, with an integrated spread spectrum mode reducing EMI. The six current sinks of the MAX20056B can be set from 20mA to 120mA, and the driver supports phase-shifted dimming for lower ripple and audible noise as well as PWM dimming. 

This allows sinks to be used in parallel for driving higher current strings and provides a dimming ratio up to 10,000:1.

  • 4.5V to 42V operating voltage range
  • Tolerant to 52V load-dump transients
  • Integrated current-mode switching DC-DC controller
  • Supports boost, SEPIC, or coupled-inductor buck-boost topologies
  • 400kHz to 2.2MHz programmable switching frequency
  • Integrated ±6% spread spectrum mode reduces EMI
  • 6x current sinks
  • Single resistor sets all sinks from 20mA to 120mA
  • Phase-Shift Dimming
  • Strings turned on at separate times
  • Reduces input and output ripple and audible noise
  • PWM Dimming
  • Allows parallel connection of current sinks for >120mA per string
  • Dimming ratio of 10,000:1 at 200Hz

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