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CN3165 Battery Charger Module

This compact printed circuit board is designed to serve as a single-cell Li-Ion battery charger and power-out module. Its USB-C interface provides 5 V from any compliant source, powering an on-board charger IC that supports charging currents of 250 mA, 750 mA, or 1 A. Two sets of screw-terminal outputs are available:

  • Battery In: for charging the battery safely.
  • Battery Out: for delivering battery voltage to a load even while the battery is charging.

Description

USB Power Input

The USB-C port accepts a 5 V supply from PCs, charger bricks, or power banks.

Safety Features

Integrated safety measures include over-voltage, over-current, and thermal shutdown protections. Additionally, a reverse-current diode prevents the battery from discharging back into the USB source when disconnected or inactive.

Pinout


ComponentPCB LabelDescription
USB-C ConnectorUSB IN5 V power input from USB-C source
ConnectorBattery INScrew terminals for connecting the Li-ion cell
ConnectorBattery OutScrew terminals for outputting battery voltage
CHRG LEDCHRGIndicator LED: on during the charging phase
DONE LEDDONEIndicator LED: on when the charging cycle completes