Micro USB 5V 1A 18650 TP4056 Lithium Battery Charger Module
Specifications
Electrical Parameters
- Input Voltage: 4.5V to 5.5V DC (via Mini USB or solder pads)
- Charging Voltage: 4.2V ± 1% (constant voltage)
- Charging Current: Adjustable, default 1A (via resistor configuration)
- Input Current: Up to 1A (based on the charging current setting)
- Efficiency: ~85% at 1A charging current
- Battery Type: Single-cell lithium-ion/lithium-polymer
- Termination Current: 10% of programmed charging current (e.g., 100mA for 1A setup)
Features
- Protection Circuits:
- Overcharge Protection
- Overcurrent Protection
- Short-circuit Protection
- Reverse Polarity Protection (limited to input connections)
- Thermal Regulation: Automatically reduces charging current to prevent overheating.
- Soft Start: Reduces inrush current during startup.
- Automatic Recharge: Initiates charging if the battery voltage drops below a preset level (~4.05V).
Adjustable Charging Current
- The charging current can be adjusted by replacing the onboard resistor (RPROG):
- Default: 1.2kΩ for 1A current
- Approximate Formula: I_CHARGE = 1200V / RPROG (Ω)
Applications
- DIY Electronics
- Power Banks
- Battery Management Systems
- Portable Devices
- Solar Charging Systems
Operating Conditions
- Operating Temperature: -10°C to +85°C
- Storage Temperature: -65°C to +125°C
- Humidity: 5% to 90% RH (non-condensing)
Safety Recommendations
- Ensure proper heat dissipation if charging at high currents.
- Do not exceed the recommended input voltage (5.5V).
- Use with batteries having built-in protection circuits for maximum safety.
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