MCP73871 USB DC Solar Lipoly Lithium Lon Polymer Charger 3.7/4.2V Battery Module

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Visit store<br>Items for sale<br>About us<br>Product Details<br>Features<br>Integrated System Load Sharing and Battery<br>Charge Management<br>- Simultaneously Power the System and<br>Charge the Li-Ion Battery<br>- Voltage Proportional Current Control (VPCC)<br>ensures system load has priority over Li-Ion<br>battery charge current<br>- Low-Loss Power-Path Management with<br>Ideal Diode Operation<br>Complete Linear Charge Management Controller<br>- Integrated Pass Transistors<br>- Integrated Current Sense<br>- Integrated Reverse Discharge Protection<br>- Selectable Input Power Sources: USB Port or<br>AC-DC Wall Adapter<br>Preset High Accuracy Charge Voltage Options:<br>- 4.10V, 4.20V, 4.35V or 4.40V<br>- ¡À0.5% Regulation Tolerance<br>Constant Current / Constant Voltage (CC/CV)<br>Operation with Thermal Regulation<br>Maximum 1.8A Total Input Current Control<br>Resistor Programmable Fast Charge Current<br>Control: 50 mA to 1A<br>Resistor Programmable Termination Set Point<br>Selectable USB Input Current Control<br>- Absolute Maximum: 100 mA (L) / 500 mA (H)<br>Automatic Recharge<br>Automatic End-of-Charge Control<br>Safety Timer With Timer Enable/Disable Control<br>0.1C Preconditioning for Deeply Depleted Cells<br>Battery Cell Temperature Monitor<br>Undervoltage Lockout (UVLO)<br>Low Battery Status Indicator (LBO)<br>Power-Good Status Indicator (PG)<br>Charge Status and Fault Condition Indicators<br>Numerous Selectable Options Available for a<br>Variety of Applications:<br>- Refer to Section 1.0 ¡°Electrical<br>Characteristics¡± for Selectable Options¡±<br>- Refer to the ¡°Product Identification<br>System¡± for Standard Options<br>Temperature Range: -40¡ãC to +85¡ãC<br>Packaging: 20-Lead QFN (4 mm x 4 mm)<br>Applications<br>GPSs / Navigators<br>PDAs and Smart Phones<br>Portable Media Players and MP3 Players<br>Digital Cameras<br>Bluetooth Headsets<br>Portable Medical Devices<br>Charge Cradles / Docking Stations<br>Toys<br>Description<br>The MCP73871 device is a fully integrated linear<br>solution for system load sharing and Li-Ion / Li-Polymer<br>battery charge management with ac-dc wall adapter<br>and USB port power sources selection. It¡¯s also<br>capable of autonomous power source selection<br>between input or battery. Along with its small physical<br>size, the low number of required external components<br>makes the device ideally suited for portable<br>applications.<br>The MCP73871 device automatically obtains power for<br>the system load from a single-cell Li-Ion battery or an<br>input power source (ac-dc wall adapter or USB port).<br>The MCP73871 device specifically adheres to the<br>current drawn limits governed by the USB specification.<br>With an ac-dc wall adapter providing power to the<br>system, an external resistor sets the magnitude of 1A<br>maximum charge current while supports up to 1.8A<br>total current for system load and battery charge<br>current.<br>The MCP73871 device employs a constant current /<br>constant voltage (CC/CV) charge algorithm with<br>selectable charge termination point. The constant<br>voltage regulation is fixed with four available options:<br>4.10V, 4.20V, 4.35V, or 4.40V to accommodate new,<br>emerging battery charging requirements. The<br>MCP73871 device also limits the charge current based<br>on die temperature during high power or high ambient<br>conditions. This thermal regulation optimizes the<br>charge cycle time while maintaining device reliability.<br>The MCP73871 device includes a low battery indicator,<br>a power-good indicator and two charge status<br>indicators that allows for outputs with LEDs or<br>communication with host microcontrollers. The<br>MCP73871 device is fully specified over the ambient<br&