The request
“A USB-powered single-cell Li-ion charger with an MCP73831: 10 µF capacitors on the input and on the battery, a 2k resistor on PROG to set the charge current, and a status LED through 330 Ω.”
Then tryAdd a load switch between the battery and the ESP32Show the charge current the 2k resistor sets
What is in this drawing
Read the decisions behind it.
01
MCP73831 selected for its simple, low-cost single-cell charging with programmable current and status output.
02
Charge current set to about 500mA via 2kΩ PROG resistor.
03
Status LED driven from open-drain STAT pin to indicate charging state.
Reusable for any low-power ESP32 or IoT device needing Li-ion battery charging from a USB source.
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