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

1. Protection Circuits:
   • Overcharge Protection
   • Overcurrent Protection
   • Short-circuit Protection
   • Reverse Polarity Protection (limited to input connections)
2. Thermal Regulation: Automatically reduces charging current to prevent overheating.
3. Soft Start: Reduces inrush current during startup.
4. 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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TP4056 Lithium Battery Charger Module – MINI USB
Ashen Premathilake