The ISL95871C is a highly integrated Lithium-ion battery charger controller, programmable over the System Management Bus (SMBus) with internal switching FETs. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency and system bus boosting prevention. The ISL95871C charges one to four Lithium-ion series cells, and delivers up to 8A charge current. Integrated MOSFETs and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10m sense resistors. The ISL95871C provides 0.5% battery voltage accuracy.