CD42 5V2A Charge/Discharge Integrated Module 3.7/4.2V Lithium Battery Boost Charge/Discharge Protection

Product details

Charging Voltage:DC4.5V-5.5V (DC5V recommended)
Charging Current:0-2.1A
Charging Quiescent Current:100uA
Full Charge Voltage:4.2V±1%
Discharge Current:0-2.4A
Discharge Quiescent Current:50uA
Discharge Efficiency:≤96%
Output Voltage:5V
Output Current:0-2.1A
Operating Temperature:-20°C to +85°C

The module comes with built-in lithium battery protection (compatible with batteries both with and without built-in protection boards)

Overcurrent Protection (OCP):Yes
Overvoltage Protection (OVP):Yes
Short Circuit Protection (SCP):Yes
Overtemperature Protection (OTP):Yes

Pin Description:

VIN:Charging Input Positive (DC4.5V-5.5V, DC5V recommended)
GND:Charging Input Negative
GND:Lithium Battery Negative
BAT:Lithium Battery Positive
GND:Output Negative
VOUT:Output Positive
KEY:Output Enable Trigger Port (Low pulse trigger)

1. In discharge mode (KEY function is disabled during charging mode), trigger the KEY port once to turn on the output; trigger the KEY port twice in succession to turn off the output.
2. When a load is connected for the first time, the output will be automatically enabled. If the load is less than 50mA, the output will turn off after 30 seconds; if the load is greater than 50mA, the output will remain on.
3. Charging and discharging simultaneously is supported (Note: Under this condition, the output voltage is >4.7V / <5V).