MAX16834 Maxim Integrated Products, MAX16834 Datasheet

MAX16834

Manufacturer Part Number

MAX16834

Description

High-Power LED Driver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX16834.pdf (23 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

MAX16834ATP+T

Manufacturer:

MAXIM

Quantity:

1 067

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX16834ATP/V+T

Manufacturer:

MAXIM

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

MAX16834AUP+

Manufacturer:

MAXIM/美信

Quantity:

20 000

Company:

HardFindElectronics Ltd

Part Number:

MAX16834AUP+T

Manufacturer:

MAXIM

Quantity:

5 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

MAX16834AUP/V+T

Manufacturer:

MAXIM/美信

Quantity:

20 000

Current page: 1 of 23
Download datasheet (240Kb)

www.DataSheet4U.com

The MAX16834 is a current-mode high-brightness LED

(HB LED) driver for boost, buck-boost, SEPIC, and high-

side buck topologies. In addition to driving an n-channel

power MOSFET switch controlled by the switching con-

troller, it also drives an n-channel PWM dimming switch to

achieve LED PWM dimming. The MAX16834 integrates

all the building blocks necessary to implement a fixed-fre-

quency HB LED driver with wide-range dimming control.

The MAX16834 features constant-frequency peak cur-

rent-mode control with programmable slope compensa-

tion to control the duty cycle of the PWM controller.

A dimming driver designed to drive an external n-chan-

nel MOSFET in series with the LED string provides

wide-range dimming control up to 20kHz. In addition to

PWM dimming, the MAX16834 provides analog dim-

ming using a DC input at REFI. The programmable

switching frequency (100kHz to 1MHz) allows design

optimization for efficiency and board space reduction.

A single resistor from RT/SYNC to ground sets the

switching frequency from 100kHz to 1MHz while an

external clock signal at RT/SYNC disables the internal

oscillator and allows the MAX16834 to synchronize to

an external clock. The MAX16834’s integrated high-

side current-sense amplifier eliminates the need for a

separate high-side LED current-sense amplifier in

buck-boost applications.

The MAX16834 operates over a wide supply range of

4.75V to 28V and includes a 3A sink/source gate driver

for driving a power MOSFET in high-power LED driver

applications. It can also operate at input voltages

greater than 28V in boost configuration with an external

voltage clamp. The MAX16834 is also suitable for DC-

DC converter applications such as boost or buck-

boost.

enable/disable input, an on-chip oscillator, fault indica-

tor output (FLT) for LED open/short or overtemperature

conditions, and an overvoltage protection sense input

(OVP+) for true overvoltage protection.

The MAX16834 is available in a thermally enhanced

4mm x 4mm, 20-pin TQFN-EP package and in a thermal-

ly enhanced 20-pin TSSOP-EP package and is specified

over the automotive -40°C to +125°C temperature range.

19-4235; Rev 2; 5/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

High-Power LED Driver with Integrated High-Side LED

Single-String LED LCD Backlighting

Automotive Rear and Front Lighting

Projection System RGB LED Light Sources

Architectural and Decorative Lighting (MR16, M111)

Spot and Ambient Lights

DC-DC Boost/Buck-Boost Converters

Current Sense and PWM Dimming MOSFET Driver

Additional

________________________________________________________________ Maxim Integrated Products

General Description

features

include

Applications

external

o Wide Input Operating Voltage Range (4.75V to

o Works for Input Voltage >28V with External

o 3000:1 PWM Dimming/Analog Dimming

o Integrated PWM Dimming MOSFET Driver

o Integrated High-Side Current-Sense Amplifier for

o 100kHz to 1MHz Programmable High-Frequency

o External Clock Synchronization Input

o Programmable UVLO

o Internal 7V Low-Dropout Regulator

o Fault Output (FLT) for Overvoltage, Overcurrent,

o Programmable True Differential Overvoltage

o 20-Pin TQFN-EP and TSSOP Packages

+ Denotes a lead(Pb)-free/RoHS-compliant package.

* EP = Exposed pad.

/V denotes an automotive qualified part.

Pin Configurations appear at end of data sheet.

MAX16834ATP+

MAX16834ATP/V+

MAX16834AUP+

MAX16834AUP/V+

OFF

28V)

Voltage Clamp on V

LED Current Sense in Buck-Boost Converter

Operation

and Thermal Warning Faults

Protection

ANALOG

PART

DIM

Simplified Application Circuit

PWMDIM

PGND

REFI

MAX16834

-40°C to +125°C

BOOST LED DRIVER

Ordering Information

TEMP RANGE

DIMOUT

SENSE+

for Boost Converter

NDRV

PIN-PACKAGE

20 TQFN-EP*

20 TSSOP-EP*

Features

LED+

LED-

LEDs

Related parts for MAX16834

Related keywords

MAX16834 datasheet
MAX16834 data sheet
MAX16834 pdf datasheet
MAX16834 component
MAX16834 part
MAX16834 distributor
MAX16834 RoHS
MAX16834 datasheet download