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MAX16818：1.5MHz, 30A High-Efficiency LED Driver with Rapid LED Current Pulsing

First High-Efficiency, High-Power LED Driver that Enables Rapid Transient Response, Accurate LED Current Regulation, PWM and Analog Dimming

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.

Key Features 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

MAX16818: Simplified Diagram Applications/Uses Front Projectors/Rear Projection TVs LCD TVs and Display Backlight Portable and Pocket Projectors

DataSheet

Parametrics

Design kits & evaluation modules

• MAX16818EVKIT

Quality and Environmental Data

• MAX16818.pdf

Ordering Information