MAX8830EWE データシートの表示（PDF） - Maxim Integrated

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MAX8830EWE

LED Light Management IC in 2.5mm x 2.5mm UCSP

Maxim Integrated 

19-0782; Rev 1; 6/08

LED Light Management IC in

2.5mm x 2.5mm UCSP

General Description

The MAX8830 light management IC integrates a 400mA

(guaranteed) PWM DC-DC step-up converter, a 320mA

white LED camera flash current sink, and four program-

mable LED current sinks. The internal 1MHz step-up

converter features an internal switching MOSFET and

synchronous rectifier to improve efficiency and minimize

external component count. The camera flash output cur-

rent and maximum timer is programmable through I2C.

Each LED current is individually regulated to a program-

mable level (from off to 10mA in 32 steps) and is com-

pletely independent of each other.

An I2C interface controls individual on/off of all outputs,

step-up output voltage setting, movie/flash current,

flash timer duration settings, and individual LED current

sink settings.

The MAX8830 is available in a 16-bump UCSP™ pack-

age (2.5mm x 2.5mm).

Applications

Cell Phones and Smartphones

PDAs and MP3 Players

Typical Operating Circuit

INPUT

2.7V TO 5.5V

CIN

2.2μH TO

10μH

LX

IN

GND

PROGRAMMABLE

OUTPUT

3.8V TO 5.2V

UP TO 400mA*

OUT

COUT

PGND

MOVIE ON

FLASH ON

IC

VLOGIC

MAX8830

COMP

320mA FLASH

FLED

MVON

FLEN

LED1

SCL

LED2

SDA

LED3

VDD

LED4

*GUARANTEED OUTPUT CURRENT FOR EXTERNAL CIRCUITRY IS 400mA

MINUS THE SUM OF ALL LED CURRENTS.

Features

♦ Step-Up DC-DC Converter

400mA Guaranteed Output Current

Over 90% Efficiency

On-Chip FET and Synchronous Rectifier

Fixed 1MHz PWM Switching

Small 2.2µH to 10µH Inductor

I2C-Programmable VOUT (3.8V to 5.2V and Off in

16 Steps)

♦ Flash LED Current Sink

I2C-Programmable Flash Output Current (Off to

320mA in 32 Steps)

I2C-Programmable Flash Maximum Timer (0.5s,

1.0s, 1.5s, or 2.0s)

I2C-Programmable Movie Output Current (Off to

160mA in 16 Steps)

Movie Enabled by I2C or Logic Input

Flash Enabled by Logic Input

Low Dropout (75mV typ)

♦ Four LED Current Sinks

Individually I2C-Programmable Output Current

Off to 10mA in 32 Steps

Low LED Sink Current Dropout Voltage (30mV typ)

♦ I2C Interface

Write Address (0x94), Read Address (0x95)

Individual On/Off and LED Current Settings

Simple Register Mapping

♦ < 1µA Shutdown Current

♦ Open/Short LED Detection

♦ Thermal-Shutdown Protection

♦ 16-Bump, 2.5mm x 2.5mm UCSP Package

Ordering Information

PART

TEMP

RANGE

MAX8830EWE+T

-40°C to

+85°C

+Denotes a lead-free package.

PIN-PACKAGE

16 UCSP (2.5mm x 2.5mm)

Pin Configuration appears at the end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products 1

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.

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