12pcs 2A 5V Charge Discharge Integrated Module with 3.7V 4.2V for 18650 Lithium Battery Charging Boost and Mobile Power Protection PCB Board Module

Product Name: 5V Integrated Charge and Discharge ModuleCharging Voltage: DC 4.5V–5.5V (Recommended DC 5V)Charging Current: 0–2.1ACharging Static Current: 100μAFull Charge Voltage: 4.2V ±1%Discharge Current: 0–3.5ADischarge Static Current: 50μADischarge Efficiency: <96%Output Voltage: 5VOutput Current: 0–2.1AOperating Temperature: -20°C to +85°CProtection 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 DescriptionVIN: Positive Input Terminal for Charging Port (+DC4.5V–5.5V)GND: Negative Input Terminal for Charging PortGND: Negative Terminal for Lithium BatteryBAT: Positive Terminal for Lithium BatteryGND: Negative Output Terminal for LoadVOUT: Positive Output Terminal for LoadKEY: Output Enable Trigger Port (Low-Level Pulse Trigger)Key FeaturesIn 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 <50mA, output turns off after 30 seconds.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.

• Integrated 4-Function Design: Lithium Battery Protection module with Over-Current Protection, Over-Voltage Protection, Over-Temperature Protection, and Short Circuit Protection helps safeguard battery performance under typical operating conditions
• Smart Load Detection: Automatically activates output for initial load connection; if load <50mA, output deactivates after 30 seconds; if load >50mA, output remains active for efficient power delivery
• Voltage Regulation & Efficiency: Discharge Efficiency up to 96% in discharge mode; Voltage Regulation maintains stable 5V output during charging and discharging processes
• Trigger Compatibility: Low-level trigger (ground) interface for MCU integration; single trigger opens output, double trigger closes output for programmable control
• Versatile Applications: Suitable for Mobile Power Applications such as solar panel integration, car charging retrofit, driving recorders, smart home devices, and portable electronics