Chargers
Boardoza MCP73831 Lithium Battery Charger Breakout
The Boardoza MCP73831 Module is a compact single-cell Li-Ion / Li-Polymer battery charger built around the Microchip MCP73831 linear charge management controller. Designed for space-limited and cost-sensitive applications, it provides a simple, reliable, and efficient charging solution with minimal external components. This module is ideal for portable devices and embedded systems that require direct USB or 5V DC input. The onboard USB Type-C connector and solderable input pads offer flexible power input options, while the adjustable charge current allows easy adaptation for various battery capacities.
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Key Features
- Microchip MCP73831 Charge Controller: High-accuracy linear charge management IC.
- Wide Input Voltage Range: Operates from 3.75V to 6V (USB and DC supply compatible).
- Programmable Charge Current: Up to 500 mA, adjustable via onboard resistor (R3).
- Integrated Power Input Options: USB Type-C connector and solder pads for flexibility.
- Full Battery Protection: Reverse discharge, thermal regulation, and voltage monitoring.
- Compact Design: 20mm × 40mm board size, ideal for portable projects.
- Automatic Charge Termination: Stops charging when battery reaches full voltage (4.2V).
Technical Specifications
- Manufacturer
- Microchip Technology
- Model
- MCP73831
- Input Voltage Range
- 3.75V – 6V
- Output Voltage
- 4.2V (fixed, 1S Li-Ion/Li-Po)
- Charge Current
- Up to 500 mA (set by R3)
- Type
- USB Type-C & solderable pads
- Functions
- 1-cell Li-Ion / Li-Polymer battery charger
- Protections
- Reverse discharge, thermal limit, short circuit
- Operating Temperature
- –40°C ~ +85°C
- Board Dimensions
- 20mm × 40mm
Board Pinout
( J1 ) Battery Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | + | Battery positive connection |
| 2 | – | Battery ground connection |
Datasheet
Download (PDF)Support
For technical questions, documentation and issue reports, use the GitHub repository or write to us directly.