MAX16831 Maxim Integrated Products, MAX16831 Datasheet

MAX16831

Manufacturer Part Number

MAX16831

Description

High-Power LED Driver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX16831.pdf (20 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

MAX16831ANBR

Manufacturer:

MAXIM/美信

Quantity:

20 000

Current page: 1 of 20
Download datasheet (347Kb)

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 simpli-

fies 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 automo-

tive 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 efficien-

cies 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.

19-0809; Rev 0; 4/07

Pin Configuration appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Automotive Exterior Lighting:

Industrial and Architectural Lighting

Emergency Lighting

Projectors with RGB LED Light Sources

Navigation and Marine Indicators

High-Beam/Low-Beam/Signal Lights

Rear Combination Lights (RCL)

Daytime Running Lights (DRL)

Fog Light and Adaptive Front Light Assemblies

High-Voltage, High-Power LED Driver with

________________________________________________________________ Maxim Integrated Products

General Description

Analog and PWM Dimming Control

Applications

o Wide Input Range: 6V to 76V With Cold-Start

o Integrated Differential LED Current-Sense

o Floating Dimming Driver Capable of Driving an

o 5% LED Current Accuracy

o 200Hz On-Board Ramp Syncs to External PWM

o Programmable Switching Frequency (125kHz to

o Output Overvoltage Load Dump, LED Short,

o Low 107mV LED Current Sense for High

o Enable/Shutdown Input with Shutdown Current

+ Denotes lead-free package.

* EP = Exposed pad.

MAX16831ATJ+ -40°C to +125°C 32 TQFN-EP* T3255M-4

Typical Operating Circuits continued at end of data sheet.

REG1

Operation to 5.5V

Amplifier

n-Channel MOSFET

Dimming Signal

600kHz) and Synchronization

Overtemperature Protection

Efficiency

Below 45µA

UV1

PART

UVEN

UV2

DIM

COMP

RTSYNC

UVEN

DIM

REG1

Typical Operating Circuits

TEMP RANGE

AGND

CLMP

Ordering Information

MAX16831

BUCK-BOOST CONFIGURATION

CLMP

SGND

CS-

REG2

CS+

DRI

DGT

PIN-

PACKAGE

QGND

SNS+

SNS-

DRV

REG2

SENSE

Features

OV2

OV1

CODE

PKG

LEDs

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