Battery Charger Module

Details

A101 and A102 are tiny battery charger module, with the following function:

• Battery Charging
• Voltage Supervision
• DC/DC Voltage Conversion

Battery Charging

A101 and A102 support 1s Lithium polymer battery, this board provide charging and discharge function to the battery. Charging current is adjustable by changing the resistor value on the board, form 50mA to 800mA, default is set to 100mA. Charging input voltage is 5V and can be connected through the Type-C port or the soldering pin on board.

Voltage Supervision

Voltage supervision is a voltage monitor function that can stop the output when the battery voltage falls below a certain threshold, and recover the output when battery voltage raise again. For the LDO version, the default cut-off voltage is 3.08V, recovery voltage is 3.4V. For the Buck-Boost version, the default cut-off voltage is 2.75V, recovery voltage is 3.3V. Both voltage threshold can be adjusted by changing the resistor value on board.

DC/DC Voltage Conversion

The board provide voltage conversion function, the output voltage can be adjusted to fit different requirements. The default output voltage is 3.3V for both version. Max output current is 1A.

Layout

Technical Specification

Battery Charging

Parameter	A101 / A102
Charging Port	Type-C / Soldering Pin
Battery Port	SH1.0 / Soldering Pin
Charging Input Voltage	5V
Charging Current	50mA to 800mA (default 100mA)

Voltage Supervision

Parameter	A101	A102
Cut-off Voltage	3.08V	2.75V
Recover Voltage	3.4V	3.3V

DC/DC Voltage Conversion

Parameter	A101	A102
Voltage Conversion Method	LDO	Buck-Boost
Output Port	Soldering Pin	Soldering Pin
Output Voltage	0.55V - 3.3V	2.3 - 5.3V
Default Output Voltage	3.3V	3.3V
Max Output Current	1A	1A