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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 284kB) Download   E-Mail

Description

The MAX16831 is a current-mode, high-brightness LED (HBLED) driver designed to control two external n-channel MOSFETs for the single-string LED current regulation. The MAX16831 integrates all the building blocks necessary to implement fixed-frequency HBLED drivers with wide-range dimming control. The MAX16831 is configurable to operate as a step-down (buck), step-up (boost), or step-up/-down (buck-boost) current regulator. Current-mode control with leading-edge blanking simplifies control-loop design. Internal slope compensation stabilizes the current loop when operating at duty cycles above 50%. The MAX16831 operates over a wide input voltage range and is capable of withstanding automotive load-dump events. Multiple MAX16831s can be synchronized to each other or to an external clock. The MAX16831 includes a floating dimming driver for brightness control with an external n-channel MOSFET in series with the LED string. HBLED drivers using the MAX16831 achieve efficiencies of over 90% in automotive applications. The MAX16831 also includes a 1.4A source and 2.5A sink gate driver for driving switching MOSFETs in high-power LED driver applications, such as front light assemblies. The dimming control allows for wide PWM dimming at frequencies up to 2kHz. Higher dimming ratios of up to 1000:1 are achievable at lower dimming frequencies. The MAX16831 is available in a 32-pin thin QFN package with exposed pad and operates over the -40°C to +125°C automotive temperature range.

An evaluation kit is available:  MAX16831EVKIT  

Key Features		Applications/Uses
Wide Input Range: 6V to 76V with Cold-Start Operation to 5.5V Integrated Differential LED Current-Sense Amplifier Floating Dimming Driver Capable of Driving an n-Channel MOSFET 5% LED Current Accuracy 200Hz On-Board Ramp Syncs to External PWM Dimming Signal Programmable Switching Frequency (125kHz to 600kHz) and Synchronization Output Overvoltage Load Dump, LED Short, Overtemperature Protection Low 107mV LED Current Sense for High Efficiency Enable/Shutdown Input with Shutdown Current Below 45µA		Automotive Exterior Lighting:   Daytime Running Lights (DRL)   Fog Light and Adaptive Front Light Assemblies   High-Beam/Low-Beam/Signal Lights   Rear Combination Lights (RCL) Emergency Lighting Industrial and Architectural Lighting Navigation and Marine Indicators Projectors with RGB LED Light Sources

Diagram

Typical Operating Circuit

Evaluation Kits

MAX16831EVKIT

Design Guides

Automotive (PDF)

Reliability Reports

Reliability Report: MAX16831.pdf Show FIT data for: MAX16831

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

MAX16831	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX16831ATJ+T			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0014 (PDF) Use pkgcode/variation: T3255M+4*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16831ATJ+			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0014 (PDF) Use pkgcode/variation: T3255M+4*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16831ATJ/V+T			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0014 (PDF) Use pkgcode/variation: T3255M+4*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16831ATJ/V+			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0014 (PDF) Use pkgcode/variation: T3255M+4*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX16831 New Product Press Release 2007-05-23  Product Ad: Download

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