MAX8821 Overview
The high-efficiency, adaptive-mode inverting charge pump drives up to six LEDs with constant current for uniform brightness. The LED current is controlled by an I2C interface and adjusts from 0.1mA to 25.6mA per LED into 32 pseudo-logarithmic steps. Independent voltages for each LED maximize efficiency even with large LED forward voltage (VF) mismatch.
MAX8821 Key Features
- White LED Inverting Charge Pump Independent Adaptive Current Regulators for Each LED 6 Low-Dropout Current Regulators Fl
- Dual Low-Noise LDO 45µVRMS Output Noise, 70dB PSRR Flexible I2C-Controlled Output Voltages 200mA and 300mA Output Curren