Boardoza MCP73831 Module

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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Front Side	Back Side

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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).

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Technical Specifications

Manufacturer: Microchip Technology
Model: MCP73831
Input Voltage Range: 3.75V – 6V
Output (Charge) Voltage: 4.2V (fixed, 1S Li-Ion/Li-Po)
Charge Current: Up to 500 mA (set by R3)
Power Input 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

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Board Pinout

( J1 ) Battery Connector

Pin Number	Pin Name	Description
1	+	Battery positive connection
2	–	Battery ground connection

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Board Dimensions

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Step Files

Boardoza MCP73831.step

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Datasheet

Microchip MCP73831 Datasheet.pdf

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Version History

• V1.0.0 – Initial Release

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Support

For technical questions or assistance, please contact [email protected]

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License

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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.