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Single-cell linear charge controller

MCP73831 Basic Circuit

Build a basic MCP73831 circuit with labeled pins, component values and connection guidance.

Package view

MCP73831 in a circuit

Physical SOT-23-5 connections and a modest 100 mA example.

MCP73831 SOT235 with5.2V inputpin4,ground2,batterypositive3,10kPROG5,LEDfromsupplytoSTAT1and4.7uFbypasscapacitors.
Use a compatible protected cell and the cell manufacturer’s charge limits. All ground symbols share one return.

Connect it, step by step

Follow the component values and pin connections

Bypass both power nodes

Place at least 4.7 µF at VDD and VBAT, close to the IC.

Set a suitable current

10 kΩ from PROG to VSS gives nominal 100 mA.

Read the charge indication

The input-powered LED lights while STAT sinks current; it is not a fuel gauge.

Component view