O2Micro Products - Intelligent Charger - 广东联兄达雕塑有限公司

iconINTELLIGENT CHARGERS

Patented Battery Chargers and Chargers with Hybrid Power Boost charge notebook batteries with unmatched efficiency and reliability, operating as a stand-alone charger or under the supervision of the host micro-controller. All chargers provide 0.7% constant voltage operation accuracy, automatic AC adapter voltage detection, and easy interface with a microcontroller.


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BATTERY CHARGER APPLICATIONS

FEATURES (OZ8618)

  • Battery Charge Controller with NMOS system power selector
  • High efficiency of >95%
  • Dynamic AC adapter current allocation for maximum charging rate
  • Protection includes built-in:
    1. — Adapter and battery under-voltage
    2. — Battery short circuit, over-voltage, and over-current
    3. — Protection for operation at low charging current
  • Automatic AC Adapter voltage detection
  • Charges batteries of various chemistries, including Li-Ion with 2, 3, and 4 cells

FEATURES (OZ8681)

  • Simplified SMBus control of battery voltage, charge current and adapter input current
  • Smallest package on market (3 X 3mm) - space-saving 16-pin QFN
  • Automatic AC Adapter voltage detection
  • Outputs valid adapter presence
  • Protection includes built-in:
    1. — Battery over-voltage and over-current
    2. — Over-current and reverse connection
    3. — Embedded thermal shutdown
  • Charges batteries of various chemistries, including LiIon with 1 to 4 cells

FEATURES (OZ8660)

  • Highly integrated, high accuracy, single battery charge controller
  • High efficiency of >94%
  • Outputs adapter and battery charge/discharge current information for monitoring
  • Battery reverse connection protection
  • Protection includes built-in:
    1. — Adapter under-voltage
    2. — Battery under-voltage, over-voltage, short circuit and over-current
    3. — Protection for operation at low charging current
    4. — Over-temperature shutdown
  • Dynamic AC adapter current allocation for maximum charging rate
  • Automatic AC Adapter voltage detection
  • Charges batteries of various chemistries, including Li-Ion with 2, 3 and 4 cells

FEATURES (OZ8555, OZ8556)

  • High accuracy, switch mode 1 cell Li-Ion charger/boost controller with integrated MOSFETs
  • Boost over-current protection
  • Adapter current sensing with programmable adapter current limit
  • Dynamic current allocation
  • Over-temperature protection
  • Thermistor sensing input

CHARGER WITH HYBRID POWER BOOST APPLICATIONS

FEATURES (OZ8690, OZ8682)

  • Highly integrated, high accuracy, single battery charge controller
  • Hybrid Power Boost feature allowing battery to provide power in parallel with the AC adapter
  • High efficiency of >95%
  • Simplified SMBus control of battery voltage, charge current and adapter input current
  • Outputs adapter and battery current information
  • Protection includes built-in:
    1. — Battery over-voltage and over-current
    2. — Adapter under-voltage and over-voltage
  • Embedded thermal shutdown protection