MCP73871 Series

USB/AC Battery Charger with Power Path Management

Catalog

USB/AC Battery Charger with Power Path Management

Part	Interface	Operating Temperature [Max]	Operating Temperature [Min]	Charge Current - Max [Max]	Current - Charging	Programmable Features	Voltage - Supply (Max) [Max]	Number of Cells	Supplier Device Package	Fault Protection	Battery Chemistry	Battery Pack Voltage	Mounting Type	Package / Case
Microchip Technology MCP73871-2CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.2 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871T-2CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.2 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871T-1CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.1 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871-1AAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.1 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871-4CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.4 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871-3CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.35 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871T-1AAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.1 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871T-3CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.35 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871-3CCI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.35 V	Surface Mount	20-VFQFN Exposed Pad
Microchip Technology MCP73871T-4CAI/ML	USB	85 °C	-40 °C	1.1 A	Constant - Programmable	Timer	6 V	1	20-QFN (4x4)	Over Temperature	Lithium Ion/Polymer	4.4 V	Surface Mount	20-VFQFN Exposed Pad

Catalog

USB/AC Battery Charger with Power Path Management

Key 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

Description

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.