Analog Devices MAX8814 Product Info

• Reduces External Components and Total Cost
  • Integrated Current-Sensing Circuit, MOSFET Pass Element, and Thermally Regulation Circuitry
  • No Reverse Blocking Diode Required
• Guarantees Safe and Accurate Battery Charging
  • Proprietary Die Temperature Regulation Control (+115°C) Allows Maximum Charging Current Without Damaging the IC
  • 4.25V to 28V Input Voltage Range with Over-Voltage Protection Above +7V to Protect Against Unqualified or Faulty AC Adapters
  • Soft-Start Limits Inrush Current
• Integrated System Features for Compact Designs
  • Programmable Fast-Charge Current: 1A_RMS Max
  • Charge-Current Monitor for Fuel Gauging (ISET)
  • Input Power-Source Detection Output (Active-Low POK) and Charge-Enable Input (Active-Low EN)
  • Output for Autobooting (ABO)
• Reduce Power Dissipation
  • Low Dropout Voltage (300mV at 500mA)

The MAX8814 intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated linear charger is designed for charging a single-cell lithium-ion (Li+) battery.

The MAX8814 controls the charging sequence from the prequalification state through constant-current fast-charge and the final constant voltage charge. The IC achieves high flexibility by providing an adjustable fast-charge current through an external resistor. It also features a booting assistant circuit that distinguishes input sources and battery connection, and provides an output signal (ABO) for system booting.

The device operates over the extended temperature range (-40°C to +85°C), and is available in an 8-pin thermally enhanced 2mm x 2mm TDFN package (0.8mm max height).

Applications

• Bluetooth® Equipment
• Cellular and Cordless Phones
• Charging Cradles and Docks
• Digital Still Cameras
• MP3 Players
• Smartphones and PDAs
• USB Appliances