ISL88733
SMBus Level 2 Battery Charger

Key Features

• Pin compatible with ISL88731
• Over-temp and overcurrent protection
• 0.5% battery voltage accuracy
• 4% adapter current limit accuracy
• 3% charge current accuracy
• SMBus 2-wire serial interface
• Charge current limited by SMBus DAC OR analog voltage at the CCLIM pin
• Monitor outputs
• Adapter current (3% Accuracy)
• Adapter overcurrent ALERT#. Threshold set by resistor divider
• 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 ISL88733 is a highly integrated Lithium-ion battery charger controller, programmable over the SMBus system management bus (SMBus). The ISL88733 is intended to be used in a smart battery charger (SBC) within a smart battery system (SBS) that throttles the charge power such that the current from the AC-adapter is automatically limited. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency. The ISL88733 charges one to four Lithium-ion series cells, and delivers up to 8A charge current. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10mΩ sense resistors. The ISL88733 provides 0.5% end-of-charge battery voltage accuracy.

The ISL88733 is available in a small 5mmx5mm 28 Ld Thin (0.8mm) QFN package.

Applications

• Notebook computers
• Tablet PCs