XRP7620

June 2012 XRP7620 4-Channel Adjustable Current I2C Controlled LED Driver Rev. 1.1.0 GENERAL DESCRIPTION The XRP7620 is a multi purpose 4-channel independently adjustable current sink driver. Optimized for LED backlighting and RGBW/RGBA color mixing applications, the XRP7620 can also be used as a generic software programmable current sink I/O expander. Supporting an industry standard 2-wire I2C serial interface, the XRP7620 provides full independent control of each channel and can be programmed up to a current of 31.5mA in steps of 0.5mA. Uniform display brightness is ensured through better than 3% channel to channel current matching. Five internal registers are provided to set operational configuration and individual channel current programmation. A specific shutdown mode allows the device to retain the previously loaded configuration – operational and current programming – in order to be reused upon the next enabling. The XRP7620 is designed to operate from a single cell lithium-ion battery or fixed 3.3V or 5.0V power rails and is available in a RoHS compliant, “green”/halogen free space saving 8-pin 2mmx3mm DFN package. APPLICATIONS  LCD Display & Keypad Backlighting  Color Coded Indicator Lighting  RGBW/RGBA Color Mixing  Cell Phones & Handheld Devices  Generic Current Sink I/O Expander FEATURES  4-Channel LED Current Sink Driver  Individual Channel Current Control  Up to 31.5mA per channel / 0.5mA Steps  100mV Channel Dropout Voltage  I2C Serial Interface  2...