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MAX16800

MAX16800

High-Voltage, 350mA, Adjustable Linear High-Brightness LED (HB LED) Driver

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Overview

Description

The MAX16800 current regulator operates from a 6.5V to 40V input voltage range and delivers up to a total of 350mA to one or more strings of high-brightness LEDs. The output current of the MAX16800 is adjusted by using an external current-sense resistor in series with the LEDs. An enable input allows wide-range "pulsed" dimming. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity. The MAX16800 is well suited for applications requiring high-voltage input and is able to withstand automotive load-dump events up to 40V. An on-board pass element minimizes external components while providing ±3.5% output current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection.

The MAX16800 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and is specified over the automotive -40°C to +125°C temperature range.

The MAX16835 is a newer and more cost effective product that provides the same performance and is pin-to-pin compatible with the MAX16800.
MAX16800: Simplified Diagram MAX16800: Simplified Diagram Enlarge+

Key Features

  • +6.5V to +40V Operating Range
  • Adjustable Level (35mA to 350mA)
  • ±3.5% Output Current Accuracy
  • Integrated Pass Element with Low-Dropout Voltage (0.5V typ)
  • Output Short-Circuit Protection
  • +5V Regulated Output with 4mA Source Capability
  • Thermal Shutdown
  • Differential LED Current Sense
  • High-Voltage Enable Pin for Dimming Interface
  • Low Shutdown Supply Current (12&µA typ)
  • Low 204mV Current-Sense Reference Reduces Power Losses
  • Wave-Shaped Soft Edges Reduce Radiated EMI During PWM Dimming
  • Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
  • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive Exterior: Tail Lights and CHMSL
  • Automotive Interior: Map, Courtesy, and Cluster Lighting
  • General Illumination
  • Navigation and Marine Indicators
  • Signage, Gasoline Canopies, Beacons
  • Warning Lights for Emergency Vehicles

Design Resources

Technical Documents

App Note 4561 Linear Brightness Controller for LEDs Has 64 Taps
App Note 3980 Power Supplies for Next-Generation Automotive Lighting
App Note 3640 MAX16800 Test Board
Tutorial 1883 LEDs Are Still Popular (and Improving) after All These Years

Quality And Environmental

Product Reliability Reports: MAX16800.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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