MAX8930 WLED电荷泵、RGB、OLED boost

电子工程师 2010-05-20 869

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描述

MAX8930 WLED电荷泵、RGB、OLED boost、LDO，带有ALC和CAI，7x7 0.4mm倾斜度WLP封装

he 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 adjustment range. The MAX8930 includes soft-start, thermal shutdown, open-circuit, and short-circuit protection.

Three 200mA LDOs are provided with programmable output voltages to provide power to external circuitry. These three LDOs can also be configured for a GPO function through the I²C. A step-up converter is also available on the MAX8930 for biasing a PMOLED subpanel.

The MAX8930 is available in the 49-bump, 3.17mm x 3.17mm WLP package.

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 Types 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

应用/使用

蜂窝电话与智能电话
PDA、数码相机、便携式摄像机和其他便携式设备

ldo
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