High-current portable charger

   The LTC®4155 and LTC4156 are dual multiplexed-input battery chargers with PowerPath™ control, featuring I2Cprogrammability and USB On-The-Go for systems suchas tablet PCs and other high power density applications.The LTC4155’s float voltage (VFLOAT) range is optimizedfor Li-Ion batteries, while the LTC4156 is optimized forlithium iron phosphate (LiFePO4)batteries, supportingsystem loads to 4A with up to 3.5A of battery charger current. I2C controls a broad range of functions and USBOn-The-Go functionality is controlled directly from the USB connector ID pin.