Power & Power Management

Overview

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.

ISL88731A Functional Diagram
ISL88731A Functional Diagram
  • 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)

Applications

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

Documentation

Title
Type 		Date
ISL88731A Datasheet
PDF 1.20 MB 		Datasheet
Industrial Power Management Brochure
PDF 5.51 MB 日本語 		Brochure
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products
PDF 326 KB 		Product Change Notice
PCN13024 - Alternate Manufacturing Site for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering - Chung-Li, Taiwan (ASECL
PDF 183 KB 		Product Change Notice
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump
PDF 173 KB 		Product Change Notice
PCN11058 - Data Sheet Electrical Specification Change for Intersil ISL88731*, ISL88731A*, ISL88731C*, and ISL95871C* Products
PDF 88 KB 		Product Change Notice
PA11015 - Data Sheet Specification Change for Intersil ISL88731A* Product
PDF 40 KB 		Product Advisory
PCN10083 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia
PDF 79 KB 		Product Change Notice
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia
PDF 248 KB 		Product Change Notice
ISL88731EVAL2Z Software Instructions
PDF 3.22 MB 		Other
AN1681: Grounding Techniques
PDF 509 KB 		Application Note
AN1684: Nonideality of Ground
PDF 397 KB 		Application Note
ISL88731EVAL2Z, ISL88731CEVAL2Z User Guide
PDF 912 KB 		Manual - Development Tools
13 items

Design & Development

Software Downloads

Title
Type Date
ISL88731xEVAL2Z Software Installer v3
ZIP 38.86 MB 		Library
ISL88731 Loop Gain Calculator
XLS 867 KB 		Software & Tools - Other
2 items

ECAD Models

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Product Options

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    ISL88731AHRZ
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    		 TQFN Tube 600 Get Samples,
    ISL88731AHRZ-T
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    Samples Available
    		 TQFN Reel 6000 Get Samples,
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