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MAX8830EWE-T

Description
LED Lighting Drivers
Categorysemiconductor    Other integrated circuit (IC)   
File Size197KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX8830EWE-T Overview

LED Lighting Drivers

MAX8830EWE-T Parametric

Parameter NameAttribute value
Product CategoryLED Lighting Drivers
ManufacturerMaxim
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 I
2
C.
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 I
2
C 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).
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
I
2
C-Programmable V
OUT
(3.8V to 5.2V and Off in
16 Steps)
Flash LED Current Sink
I
2
C-Programmable Flash Output Current (Off to
320mA in 32 Steps)
2
C-Programmable Flash Maximum Timer (0.5s,
I
1.0s, 1.5s, or 2.0s)
2
C-Programmable Movie Output Current (Off to
I
160mA in 16 Steps)
Movie Enabled by I
2
C or Logic Input
Flash Enabled by Logic Input
Low Dropout (75mV typ)
Four LED Current Sinks
Individually I
2
C-Programmable Output Current
Off to 10mA in 32 Steps
Low LED Sink Current Dropout Voltage (30mV typ)
I
2
C 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
MAX8830
Applications
Cell Phones and Smartphones
PDAs and MP3 Players
Typical Operating Circuit
2.2μH TO
10μH
PROGRAMMABLE
OUTPUT
3.8V TO 5.2V
UP TO 400mA*
OUT
C
OUT
INPUT
2.7V TO 5.5V
IN
C
IN
GND
PGND
LX
MAX8830
COMP
FLED
MOVIE ON
FLASH ON
MVON
FLEN
SCL
IC
SDA
V
LOGIC
LED3
V
DD
LED4
LED1
LED2
320mA FLASH
Ordering Information
PART
MAX8830EWE+T
TEMP
RANGE
-40°C to
+85°C
PIN-PACKAGE
16 UCSP (2.5mm x 2.5mm)
+Denotes
a lead-free package.
Pin Configuration appears at the end of data sheet.
*GUARANTEED OUTPUT CURRENT FOR EXTERNAL CIRCUITRY IS 400mA
MINUS THE SUM OF ALL LED CURRENTS.
UCSP is a trademark of Maxim Integrated Products, Inc.
1
________________________________________________________________
Maxim Integrated Products
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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