Description

Key Features

• Input: Type-C USB (5V) (also supports Micro-USB in some variants)

• Output: 1A max charging current (adjustable via resistor)

• Battery Protection: Overcharge, over-discharge, overcurrent, and short-circuit protection (DW01A + FS8205)

• LED Indicators:

  • Red LED: Charging in progress

  • Blue LED: Charging complete

• Compatible Batteries: 3.7V Li-ion/Li-Po (e.g., 18650, 10440, etc.)

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Pin Configuration & Wiring

Module Pinout

Connection Diagram

1. Connect Battery:

   • BAT+ → Battery (+)

   • BAT- → Battery (-)

2. Power Input:

   • Plug a 5V USB-C cable into the module.

3. Load Connection (Optional):

   • OUT+ → Load (+)

   • OUT- → Load (-)

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Working Principle

1. Charging Process:

   • When a 5V USB power source is connected, the TP4056 IC regulates the charging current (default 1A).

   • The red LED lights up during charging.

   • When the battery reaches 4.2V, charging stops, and the blue LED turns on.

2. Protection Circuit (DW01A + FS8205):

   • Overcharge Protection: Stops charging if voltage exceeds 4.25V.

   • Over-Discharge Protection: Cuts off output if battery drops below 2.4V.

   • Short-Circuit/Overcurrent Protection: Disconnects the battery if excessive current is detected.

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How to Use with Arduino/ESP Projects

Example: Battery-Powered Arduino Project

1. Connect the TP4056 module:

   • BAT+ & BAT- → Li-ion Battery

   • OUT+ & OUT- → Arduino Vin & GND

   • USB-C → 5V Power Source (when charging)

2. Charging Behavior:

   • While charging (Red LED ON), the Arduino can still run if powered via USB.

   • Once fully charged (Blue LED ON), the module stops charging automatically.

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Adjusting Charging Current

• The default charging current is 1A (set by a resistor on the board).

• To reduce charging current (for smaller batteries like 100mAh-500mAh), replace the Rprog resistor (usually 1.2KΩ) with a higher value:

  • 500mA → Use 2.4KΩ

  • 250mA → Use 4.8KΩ

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Applications

✅ Portable DIY electronics (Arduino, ESP8266, ESP32 projects)
✅ Solar-powered battery chargers
✅ Power banks & portable devices
✅ IoT devices with rechargeable batteries