Data Sheet Rev. 5
PDF

Overview

Features and Benefits

  • Flexible Architecture Supports a Range of LED LIghting Applications with Minimal Component Count
    • Up to 30A Output Current
    • 4.75V to 5.5V or 7V to 28V Input Voltage Range
    • Average-Current-Mode Control
    • True-Differential Remote-Sense Input
  • Frequency Management Reduces EMI and Interference with Other System Clocks
    • Programmable Switching Frequency or External Synchronization from 125kHz to 1.5MHz
    • Clock Output for 180° Out-of-Phase Operation
  • Integrated Protection Features and Thermally Enhanced Package Improve System Reliability
    • Output Overvoltage and Hiccup-Mode Overcurrent Protection
    • Thermal Shutdown
    • Thermally Enhanced 28-Pin TQFN Package

Product Details

The MAX16818 pulse-width modulation (PWM) LED driver controller provides high-output-current capability in a compact package with a minimum number of external components. The MAX16818 is suitable for use in synchronous and nonsynchronous step-down (buck) topologies, as well as in boost, buck-boost, SEPIC, and Cuk LED drivers. The MAX16818 is the first LED driver controller that enables Maxim's technology for fast LED current transients of up to 20A/µs and 30kHz dimming frequency.

This device utilizes average-current-mode control that enables optimal use of MOSFETs with optimal charge and on-resistance characteristics. This results in the minimized need for external heatsinking even when delivering up to 30A of LED current. True differential sensing enables accurate control of the LED current. A wide dimming range is easily implemented to accommodate an external PWM signal. An internal regulator enables operation over a wide input voltage range: 4.75V to 5.5V or 7V to 28V and above with a simple external biasing device. The wide switching frequency range, up to 1.5MHz, allows for the use of small inductors and capacitors.

The MAX16818 features a clock output with 180° phase delay to control a second out-of-phase LED driver to reduce input and output filter capacitors size or to minimize ripple currents. The MAX16818 offers programmable hiccup, overvoltage, and overtemperature protection.

The MAX16818ETE+ is rated for the extended temperature range (-40°C to +85°C) and the MAX16818ATE+ is rated for the automotive temperature range (-40°C to +125°C). This LED driver controller is available in a lead-free, 0.8mm high, 5mm x 5mm 28-pin TQFN package with an exposed pad.

Applications

  • Front Projectors/Rear Projection TVs
  • LCD TVs and Display Backlight
  • Portable and Pocket Projectors

Product Categories

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

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    Evaluation Boards

    Pricing displayed is based on 1-piece.

    Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.