MCP73871 USB/AC Battery Charger Evaluation Board

The MCP73871 Evaluation Board demonstrates Microchip"s stand-alone linear Li-Ion battery charger with system power path and load sharing management control solution. The system load is also supported by the Li-Ion battery when the input power is disconnected. A number of device options allow the MCP73871 to be utilized in a variety of applications. Typical applications for the reference design are Smart Phones, PDA, Portable Media Players, MP3 Players, Digital Cameras, Handheld Medical devices, Bluetooth headsets, Ultra-Mobile PC and Portable Communicators.

• Integrated System Load Sharing
• Input Current Limit Control with dip switches between ac-dc adapter (Typical 1650 mA), USB-High (Maximum 500 mA) and USB-Low (Maximum 100 mA)
• Three LED indicates charge status, low battery and power good signal
• Preset Li-Ion battery charge voltage: 4.2V ±0.5%
• Temperature monitoring is disabled by default, but can be enabled to use with NTC thermister
• Factory preset 0.1C preconditioning current of deeply depleted cells
• Factory preset 6 hour Safety Timer with Timer Enable feature
• Constant Current / Constant Voltage (CC/CV) charge algorithm
• Resistor programmed maximum charge current: 1A
• Resistor programmed termination set point: 100 mA
• Automatic Charge Termination
• Automatic Recharge
• Internal Thermal Regulation
• Exposed Pad with extra via underneath for better heat dissipations