MCP73871 Solar Battery Charging Board

The MCP73871 Solar Charging Board is ideal for DIY solar-powered projects. This charger offers a seamless solution for Li-Ion/Li-Polymer battery management with solar and USB power source options. It is also capable of autonomous power source selection between input and battery. Along with its small physical size, the low number of required external components makes the device ideally suited for portable applications.

Designed for solar charging, it efficiently utilizes available sunlight to charge batteries. Just connect a 3.7V/4.2V Li-Ion battery and a 6V solar panel, place the panel outdoors, and you're ready to charge. It can power another project simultaneously through the load output port.

Quick Spec

• Input: 5V (USB), 6V (Solar Panel)
• Battery charging at 3.7V, 4.1V, 4.2V, 4.35V or 4.4V
• Regulation tolerance of 0.5%.
• Constant current / Constant voltage (CC / CV)
• 1.8A (max.) total input current control (with heat sink). Without a heat sink, it is recommended not to exceed 1Amp
• Programmable fast charge current by resistance. Control: 50 mA to 1A
• Resistor programmable load 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 on / off control
• 0.1C preconditioning for heavily depleted cells
• Battery cell temperature monitoring
• Low voltage blocking (UVLO)
• Low Battery Status Indicator (LBO)
• Power Status Indicator (PG)
• Indicators of charge status and error states
• Dimensions: 31.5 x 30.5mm

Board Layout

Resources

• MCP73871
• Using the MCP73871
• Additional Information

Shipping List

• 1 x MCP73871 Solar Battery Charging Board
• 1 x 4700uF 25V Electrolytic Capacitor