MCP73871 Data Sheet
http://www.microchip.com/stellent/images/mchpsiteimages/dwnfolder.gifMCP73871 Data Sheet (English)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.
Parameter NameValue
Linear ModeYes
# of Cells1
Int/Ext FETInternal
Vcc Range (V)4.4 to 6
Voltage Regulation Accuracy (%)0.5
Temperature MonitorYes
Charge Safety TimersYes
Max Thermal RegulationYes
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
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