Reference: RBD-1896
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The BQ25185 charger board is a compact power management solution designed for single-cell lithium-ion or lithium-polymer batteries. It supports charging from USB Type-C, DC input, or solar panels and includes an onboard 3.3V buck converter, allowing projects to run directly from the battery without requiring a separate regulator board.
The BQ25185 charger board is a compact power management solution designed for single-cell lithium-ion or lithium-polymer batteries. It supports charging from USB Type-C, DC input, or solar panels and includes an onboard 3.3V buck converter, allowing projects to run directly from the battery without requiring a separate regulator board.
Single-cell Li-ion / LiPo battery charger
Supports USB, DC, and solar charging inputs
Integrated power-path management
Onboard 3.3V buck converter
Adjustable charge current
Regulated load outputs
Status indication LEDs
Charging and Power
Charger IC: BQ25185
Buck Converter IC: TPS62569
Battery Type: Single-cell Li-ion / LiPo
Recommended Battery Capacity: 500mAh or higher
USB Input: USB Type-C, 5V up to 1A
DC / Solar Input Voltage: 5V to 18V
Default Charge Current: 1A
Optional Charge Current: 500mA (via jumper)
Outputs
Load Output Voltage:
3.0V to 4.5V (power-path output, up to 1A)
Regulated Output Voltage:
3.3V (buck converter, up to 1A)
Indicators and Control
Charging Status LED: Orange
Fault Indicator LED: Red
3.3V Output Indicator LED: Green
Enable Pad: Controls 3.3V buck converter
Connectors and Interfaces
Battery Connector: JST PH 2-pin
USB Connector: USB Type-C
Load Output: Terminal blocks
DC / Solar Input: Edge pads
Battery-powered IoT devices
Portable embedded systems
Solar-powered sensor nodes
Wearable electronics
3.3V microcontroller projects
Remote data loggers
Connect a single-cell Li-ion or LiPo battery to the JST PH connector
Power the board using USB Type-C, DC input, or a compatible solar panel
Use the terminal block outputs to power your circuit
Optionally adjust the charge current by modifying the onboard jumper
1 x BQ25185 USB / DC / Solar charger board with 3.3V buck converter
Designed for single-cell lithium batteries only
Outputs will not exceed 4.5V or 3.3V respectively
Output voltage may drop to around 3.0V when the battery is nearly depleted
High input voltage and current may cause heat dissipation
Solar input works best with 5V to 7V panels
The BQ25185 charger board combines flexible charging options with integrated power regulation, making it a practical solution for portable and solar-powered electronics that require a stable 3.3V supply and efficient battery management.
Specific References
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The BQ25185 charger board is a compact power management solution designed for single-cell lithium-ion or lithium-polymer batteries. It supports charging from USB Type-C, DC input, or solar panels and includes an onboard 3.3V buck converter, allowing projects to run directly from the battery without requiring a separate regulator board.
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