MAX8830EWET中文資料美信數(shù)據(jù)手冊PDF規(guī)格書

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 programmable 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 current and maximum timer is programmable through I2C. Each LED current is individually regulated to a programmable level (from off to 10mA in 32 steps) and is completely independent of each other.

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

Applications

?? Cell Phones and Smartphones

?? PDAs and MP3 Players