SMBus Interfaced Battery Charger with Internal FETs

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.

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)

Applications

• Notebook Computers

• Tablet PCs

• Portable Equipment with Rechargeable Batteries