Module Function Overview

berno420

berno420

what does this module do?
302 days

flux

0:39

This module is a single-cell Li-ion battery charger based on the Microchip MCP73831. It takes a DC input at VIN, regulates charge current via a programming resistor, provides status indication with an LED, and outputs to the battery at VBAT. Key functions and components:
  • Input power connector: VIN
  • Charger IC: IC1
  • Charge-current programming resistor: Rprog
    • Sets charge current (up to 500 mA) according to the MCP73831 datasheet formula
  • Decoupling capacitors:
    • C1 (80 nF–1 µF on VIN)
    • C2 (input decoupling)
    • C3 (output decoupling on VBAT)
  • Charge-status indicator LED: STAT
  • Battery output connector: VBAT
  • Common reference (0 V): GND
Workflow: apply a DC source (e.g., 5 V) to [VIN], the MCP73831 regulates and limits charge current according to [Rprog], decoupling capacitors stabilize the rails, and [STAT] indicates charge status (on/fast-charge vs. off/charge-done). The battery attaches at [VBAT].
Calculate Rprog
Select resistor
Check cap recommendation
Select decoupling cap
LED resistor value
302 days
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    MCP73831 Module

    MCP73831 Module thumbnail
    This project is a Lithium-ion battery charger circuit utilizing the MCP73831 integrated circuit. It includes input and output connectors, a charging current programming resistor, decoupling capacitors, and a charge status indicator LED. The design can deliver up to 500mA charge current. #project #Template #charger #referenceDesign #batterycharger #template #bms #microchip

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    creativecommons.org/licenses/by/4.0/

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