MAX16818

NOT RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. 5) Product Selection Table

Part Models: 4
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Overview

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

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

Part Models: 4
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX16818: 1.5MHz, 30A High-Efficiency LED Driver with Rapid LED Current Pulsing Data Sheet (Rev.5) 04/24/2018

Reliability Data 1

MAX16818 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX16818ATI+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16818ATI+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16818ETI+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16818ETI+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

MAX16818 Evaluation Kit

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Features and Benefits

6V to 28V Input-Voltage Range
1A Output Current into an 18V LED String
Pulse-Width Modulated LED Current Dimming
Resistor-Adjustable Overvoltage Protection and Switching Frequency
180° Out-of-Phase Clock Output
Fully Assembled and Tested

Product Details

The MAX16818 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) designed to evaluate the MAX16818 pulse-width modulation (PWM) LED driver controller in a buck-boost configuration.

The MAX16818 EV kit operates from a DC supply voltage of 6V to 28V. The EV kit's output is configured to deliver at least 1A of current into an 18V series LED string. The LED brightness can be dimmed using a digital PWM signal.

The EV kit provides an option to configure the MAX16818 IC's overvoltage protection, switching frequency, and frequency compensation. The MAX16818 EV kit also features a 180° out-of-phase clock output PCB pad.