The ISL88731A is a highly integrated Lithium-ion battery charger controller, programmable over the SMBus system management bus (SMBus). The ISL88731A 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 and system bus boosting prevention. The ISL88731A 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 ISL88731A provides 0. 5% end-of-charge battery voltage accuracy. The ISL88731A 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. The ISL88731A is available in a small 5mmx5mm 28 Ld thin (0. 8mm) QFN package. An evaluation kit is available to reduce design time. The ISL88731A is available in Pb-Free packages.


  • 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 +28V Adapter Voltage Range
  • Pb-Free (RoHS compliant)



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


PDF 1.20 MB Datasheet
PDF 5.51 MB 日本語 Brochure
PDF 326 KB Product Change Notice
PDF 183 KB Product Change Notice
PDF 173 KB Product Change Notice
PDF 88 KB Product Change Notice
PDF 40 KB Product Advisory
PDF 79 KB Product Change Notice
PDF 248 KB Product Change Notice
PDF 3.22 MB Other
PDF 509 KB Application Note
PDF 397 KB Application Note
PDF 912 KB Manual - Development Tools
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