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ISL88731A Datasheet Smbus Level 2 Battery Charger

Manufacturer: Renesas

Overview: ICM SDA SCL VDDSM B GND ACOK NC ISL88731A SMBus Level 2 Battery Charger 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 10mī— 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. Pin Configuration ISL88731A (28 LD TQFN) TOP VIEW CSSP CSSN VCC BOOT UGATE PHASE DCIN 28 27 26 25 24 23 22 NC 1 21 VDDP ACIN 2 20 LGATE VREF 3 19 PGND ICOMP 4 18 CSOP NC 5 17 CSON VCOMP 6 16 NC NC 7 15 VFB 8 9 10 11 12 13 14 DATASHEET FN6738 Rev 3.

Key Features

  • 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 C.

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