MAX8930

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

Negative Charge Pump Delivers High Efficiency, OLED Boost and LDO Save Space, and ALC, CAI, and I²C Add Flexibility

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Overview

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

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