MAX8930集成电路（IC）的电源管理-专用规格书PDF中文资料

General Description

The MAX8930 integrates a charge pump for white LED display  backlighting  with  ambient light control  (ALC) feature.  The  high-efficiency,  adaptive-mode  1x/-0.5x charge  pump  drives  up  to  11  LEDs  (8  WLEDs  +  RGB LED)  with  constant  current  for  uniform  brightness.  The LED current is adjustable from 0.1mA to 25.6mA in 256 linear steps through I2C. High accuracy and LED-to-LED current matching are maintained throughout the adjust ment  range.  The  MAX8930  includes  soft-start,  thermal shutdown, open-circuit, and short-circuit protection.

Features

White LED Charge Pump

Adaptive 1x or -0.5x Negative Modes

11 Low-Dropout LED Current Sinks with 25.6mA to 0.1mA in 256 Dimming Steps

Ramp-Up/Down Control for Main White LED

Ramp-Up/Down Control for RGB LED

Individual Brightness Control for Each White, RGB LED

Low 240µA (typ) Quiescent Current

Ambient Light Control (ALC) for Any Type of Light Sensor

Content Adaptive Interface

I2C-Compatible Control Interface

Three Programmable LDOs Up to 200mA

Step-Up DC-DC Converter with Programmable Output for PMOLED Application

Low 0.1µA Shutdown Current

2.7V to 5.5V Supply Voltage Range

Thermal Shutdown

Open and Short-Circuit Protection

Applications

Cell Phones and Smartphones

PDAs, Digital Cameras, Camcorders, and Other

Portable Equipment