ISL95871C
SMBus Interfaced Battery Charger with Internal FETs

Key Features

• Internal Synchronous Buck Output Stage Power FETs
• 0.5% Battery Voltage Accuracy
• 3% Adapter Current Limit Accuracy
• 3% Charge Current Accuracy
• SMBus 2-Wire Serial Interface
• Battery Short Circuit Protection
• Fast Response for Pulse-Charging
• Fast System-Load Transient Response
• Monitor Outputs
• Adapter Current (3% Accuracy)
• AC-Adapter Detection
• 11-Bit Battery Voltage Setting
• 6 Bit Charge Current/Adapter Current Setting
• 8A Maximum Battery Charger Current
• 11A Maximum Adapter Current
• +8V to +22V Adapter Voltage Range
• Pb-Free (RoHS Compliant)

Description

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 10mΩ sense resistors. The ISL95871C provides 0.5% battery voltage accuracy.

The ISL95871C also provides a digital output that indicates the presence of the
AC-adapter as well as an analog output which indicates the adapter current within 4% accuracy.

Applications

• Notebook Computers
• Tablet PCs
• Portable Equipment with Rechargeable Batteries