Specifications
The TP4056 1A Li-Ion Battery Charger with Protection is a compact and efficient module designed for charging single-cell lithium-ion or lithium-polymer batteries. Equipped with overcharge, over-discharge, and overcurrent protection, this charger ensures reliable and safe charging for your batteries.
Input Voltage (Vin): 4.5V to 5.5V (via micro-USB or solder pads)
Output Voltage (Vout): 4.2V (regulated charging voltage)
Maximum Charge Current (Icharge): Adjustable up to 1A
Battery Type: Single-cell 3.7V lithium-ion or lithium-polymer batteries
Characteristics
- Charge Current:
- Programmable using an onboard resistor.
- Default current: 1A (can be adjusted by replacing the Rprog resistor).
- Charging Algorithm:
- CC/CV Mode: Constant Current (CC) and Constant Voltage (CV) for optimal charging.
- Preconditioning for deeply discharged batteries.
- Protections:
- Overcharge Protection:
- Stops charging when the voltage reaches 4.2V ± 1%.
- Over-Discharge Protection:
- Disconnects the battery below ~2.4V to prevent damage.
- Overcurrent Protection:
- Typically rated to handle currents up to ~3A.
- Short-Circuit Protection:
- Shuts off output in case of a short circuit to protect the battery.
- Overcharge Protection:
- Thermal Regulation:
- Built-in thermal protection for safe operation under high load.
Pin/Connector Description:
- Micro-USB Port: Standard input for charging through a USB adapter.
- IN+ and IN-: Alternate solder pads for external power input (4.5V to 5.5V).
- BAT+ and BAT-: Connect to the battery.
- OUT+ and OUT-: Output terminals for powering external circuits directly from the module.
LED Indicators:
- Red LED (Charging): Lights up during charging.
- Blue LED (Full): Lights up when charging is complete.
Physical Characteristics:
- Board Dimensions: ~25mm x 19mm
- Mounting Holes: For easy integration into projects.
Applications:
- Power banks
- DIY battery-powered devices
- Wearable electronics
- IoT devices