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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 296kB) Download   E-Mail

Description

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 patent-pending 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 exposed paddle.

An evaluation kit is available:  MAX16818EVKIT  

Key Features		Applications/Uses
High-Current LED Driver Controller IC, Up to 30A Output Current Average Current Mode Control True-Differential Remote-Sense Input 4.75V to 5.5V or 7V to 28V Input Voltage Range Programmable Switching Frequency or External Synchronization from 125kHz to 1.5MHz Clock Output for 180° Out-of-Phase Operation Integrated 4A Gate Drivers Output Overvoltage and Hiccup Mode Overcurrent Protection Overtemperature Thermal Shutdown Thermally Enhanced 28-Pin thin QFN Package -40°C to +125°C Operating Temperature Range		Portable and Pocket Projectors LCD TVs and Display Backlight Front Projectors/Rear Projection TVs Automotive, Bus/Truck Exterior Lighting Automotive Emergency Lighting and Signage

Key Specifications:  High Brightness LED Drivers

Part Number

Topology

VIN (V)

VIN (V)

Extended VIN with External Bias

LED Channels

ILED per Channel (A)

LED String Volt.

Internal Pwr. MOSFETs

Freq.

PWM Dimming Freq. (kHz)

PWM Dimming Ratio

EV Kit

Price

min

max

max

max

max

max

See Notes

MAX16818

Boost Buck Buck-Boost SEPIC

7

28

Yes

1 1

30

Set externally

No

125kHz to 1.5MHz

30

1:5000

Yes

$1.52 @1k

See All High Brightness LED Drivers (26)

Diagram

Typical Operating Circuit

Evaluation Kits

MAX16818EVKIT

Design Guides

Displays (PDF) Flat-Panel Display (PDF) Automotive (PDF)

Reliability Reports

Show FIT data for: MAX16818 Request Reliability Report for: MAX16818

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

MAX16818	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX16818ATI+			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0023 (PDF) Use pkgcode/variation: T2855+3*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16818ATI+T			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0023 (PDF) Use pkgcode/variation: T2855+3*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16818ETI+			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0023 (PDF) Use pkgcode/variation: T2855+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16818ETI+T			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0023 (PDF) Use pkgcode/variation: T2855+3*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2006-12-06

Related Products

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Technical Documents

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

Related Products   Notes and Comments   Evaluation Kits

Document Ref.: 19-0666; Rev 2; 2009-03-30
This page last modified: 2009-03-30