Adafruit bq25185 USB / DC / Solar Lithium Ion/Polymer charger

The Adafruit bq25185 USB / DC / Solar Charger Board provides unparalleled flexibility for charging various battery types including LiPoly, LiIon, and LiFePO4. With selectable charging rates—250mA, 500mA, or 1A—it effortlessly adapts to power sources like USB, DC, or solar.

The board is equipped with a USB Type C connector featuring 5.1k CC resistors for universal compatibility, along with two additional DC or solar input pads. The integrated charging chip optimizes solar input, offering near-MPPT capability without the added complexity.

Designed to protect and extend battery life, the board incorporates power path management, allowing concurrent charging and usage. Its regulated 4.5V-max load output ensures stability, while maintaining efficiency and preventing overheating.

Status LEDs display charging, fault, and power conditions, with the option to connect a 10K thermistor for temperature regulation. The board’s plug-and-play interface and customizable jumpers make it simple to integrate into your projects.

For solar applications, a 5~7V solar panel can be connected seamlessly, providing clean, renewable energy. Monitor battery and load voltage easily via secondary pads, making it an invaluable tool for any energy-conscious application.