WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI

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 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.

Applications

* Cell Phones and Smartphones * PDAs, Digital Cameras, Camcorders, and Other Portable Equipment

* 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