Protection prevents the battery overcharging and automatically controls the charging current, better protecting the battery (note that it is not suitable for 3.2V lithium iron phosphate battery).
USB Type-C female interface.
These only work with a USB A-to-C cable, they will not work with a USB C-to-C cable.
Specification:
Input voltage: 4.5V-5V
Maximum charging current: 3000mA
Charging cut-off voltage: 4.2V
Board size: 3.3cm*1.5cm
Model: AILAVI-0503V1
Main control chip: IP2312
Input voltage: 4.5~5.5V
Charge cut-off voltage: 4.2V
Charging current: 3A (can change current by adjusting resistance)
Indicator light: red = charging, blue = full
Conversion efficiency: 3A 93%, 2A 94%, 1A 95% (data is for reference only)
The IP2312 uses a full CC/CV charging mode.
When the battery voltage is lower than 3V, it enters the trickle charge mode and charges the battery with a charge current of 100mA.
When the battery voltage is greater than 3V, enter the constant current charging mode to charge the battery with the set constant current charging current.
When the battery voltage is close to 4.2V and the charging current is less than 300mA, it enters the constant voltage charging mode. After entering the constant voltage mode, the charging is stopped after every 4 minutes, and the battery voltage is detected to be higher than 4.15V: if it is higher than 4.15V, the charging is stopped, otherwise, the charging is continued, and then the detection is performed after 4 minutes.
When the battery is fully charged, if it detects that the battery voltage is lower than 4.1V, it will turn on to charge the battery.
Current adjustment instructions:
Default 3A, remove resistor 2A, replace with 135k resistor 1A
Connections:
B+ to battery positive
B- to battery negative
Out+ to load positive
Out- to load negative
5V power is supplied either by USB C or it can be hard-wired 5V positive to the connection marked + next r8 and 5V earth to the corresponding connection on the other side of the USB socket.