Product Name: 5V Integrated Charge and Discharge Module
Charging Voltage: DC 4.5V–5.5V (Recommended DC 5V)
Charging Current: 0–2.1A
Charging Static Current: 100μA
Full Charge Voltage: 4.2V ±1%
Discharge Current: 0–3.5A
Discharge Static Current: 50μA
Discharge Efficiency:
Output Voltage: 5V
Output Current: 0–2.1A
Operating Temperature: -20°C to +85°C
Protection Features: Over-Current Protection (COP), Over-Voltage Protection (OVP), Short-Circuit Protection (SCP), Over-Temperature Protection (OTP)
Dimensions: 0.98 x 0.63 inches (25 x 16 mm)
Weight: 0.33 oz (9.4g)
Pinout Description
VIN: Positive Input Terminal for Charging Port (+DC4.5V–5.5V)
GND: Negative Input Terminal for Charging Port
GND: Negative Terminal for Lithium Battery
BAT: Positive Terminal for Lithium Battery
GND: Negative Output Terminal for Load
VOUT: Positive Output Terminal for Load
KEY: Output Enable Trigger Port (Low-Level Pulse Trigger)Key Features
In Discharge Mode (KEY function invalid in charging mode):
Trigger the KEY port once to turn on the output.
Trigger the KEY port twice consecutively to turn off the output.
Automatic Load Detection:
Output turns on automatically upon initial load connection.
If the load is
If the load is >50mA, output remains active continuously.
Simultaneous Charging & Discharging:
Allows discharging while charging.
Note: Output voltage ranges between 4.7V and 5V during charging.
A brief 0.3s power interruption occurs when switching to external power during charging.
Trigger Compatibility:
Low-Level Trigger (Ground): For MCU integration.
MCU users: If a small load is connected to the KEY pin, apply a low-level signal (ground) for ~20 seconds to keep the module operational.