One Cell Lithium-ion/Polymer Battery Protection IC

■  General Description

       The XB9901A product is a high integration solution for lithiumion/polymer battery protection. XB9901A contains advanced power MOSFET, high-accuracy voltage detection circuits and delay circuits. XB9901A is put into a DFN1.8X1.4x0.55-6 package and only one external component makes it an ideal solution in limited space of battery pack.
       XB9901A has all the protection functions required in the battery application including overcharging, overdischarging, overcurrent and load short circuiting protection etc. The accurate overcharging detection voltage ensures safe and full utilization charging. The low standby current drains little current from the cell while in storage.
      The device is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Poly battery-powered information appliances requiring longterm battery life.

■  Features

  • Protection of Battery Cell Reverse Connection
  • Integrate Advanced Power MOSFET with Equivalent of 11.5mΩ RSS(ON)
  • Only One External Capacitor Required
  • DFN1.8X1.4x0.55-6  Package
  • Over-temperature Protection
  • Two-stepOvercurrentDetection:
    -Overdischarge Current
    -Load Short Circuiting
  • Overcharge Current Protection
  • Charger Detection Function
  • 0V Battery Charging Forbidden
  • Delay Times are generated inside
  • High-accuracy Voltage Detection
  • Low Current Consumption
    - Operation Mode: 3.9μ A typ.
    - Power-down Mode:2.2μA typ
  •  RoHS Compliant and Lead (Pb) Free

■  Application

  • One-Cell Lithium-ion Battery Pack
  • Lithium-Polymer Battery Pack
  • E-smoke

■  Pin Configuration


■  Typical Application Circuit




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