Microchip Technology, Inc. USB/AC Battery Charger with Power Path Management en536670

The MCP73871 device is a 1A fully integrated linear solution for system load sharing and Li-Ion / Li-Polymer battery charge management with AC-DC wall adapter and USB port power sources selection. It’s also capable of autonomous power source selection between input or battery. The MCP73871 device employs a constant current/constant voltage (CC/CV) charge algorithm with selectable charge termination point. The constant voltage regulation is fixed with four available options: 4.10V, 4.20V, 4.35V, or 4.40V. Additional Features Integrated System Load Sharing and Battery Charge Management Simultaneously Power the System and Charge the Li-Ion Battery Integrated Pass Transistors Integrated Current Sense Integrated Reverse Discharge Protection Selectable Input Power Sources: USB Port or AC-DC Wall Adapter Preset High Accuracy Charge Voltage Options:4.10V, 4.20V, 4.35V or 4.40V ±0.5% Regulation Tolerance Maximum 1.8A Total Input Current Control Resistor Programmable Fast Charge Current Control: 50 mA to 1A Resistor Programmable Termination Set Point Selectable USB Input Current Control: Absolute Maximum: 100 mA (L) / 500 mA (H) Automatic Recharge Automatic End-of-Charge Control Safety Timer With Timer Enable/Disable Control 0.1C Preconditioning for Deeply Depleted Cells Battery Cell Temperature Monitor Undervoltage Lockout (UVLO) Low Battery Status Indicator (LBO) Power-Good Status Indicator (PG) Charge Status and Fault Condition Indicators