How to Use TP4056 Battery Charging Protection Module (Type C): Examples, Pinouts, and Specs

The TP4056 Battery Charging Protection Module (Type C) is a compact, highly integrated solution for charging and protecting single-cell lithium-ion or lithium polymer batteries. It is equipped with a USB Type-C input port and is designed for portable electronic devices, such as power banks, DIY electronics projects, and any application that requires battery management. The module's built-in protection features safeguard the battery from overcharging, over-discharging, and overcurrent conditions, ensuring safe and reliable operation.

• Input Voltage (V_IN): 4.5V to 5.5V
• Charge Current (I_CHG): Programmable up to 1A via resistor
• Battery Voltage (V_BAT): 4.2V precision charging voltage
• Operating Temperature: -10°C to +85°C
• Charging Indicator: LED status for charging and full charge
• Protection Features: Overcharge, over-discharge, and overcurrent protection

1. Connecting the Battery:

   • Connect the positive terminal of the battery to the B+ pin.
   • Connect the negative terminal of the battery to the B- pin.

2. Power Supply:

   • Connect a 5V power supply to the USB Type-C input (IN+ and IN- pins).

3. Load Connection:

   • Connect the load to the OUT+ and OUT- pins.

4. Charging:

   • When the module is powered via USB Type-C, the charging process starts automatically if the battery voltage is below 4.2V.
   • The charging status is indicated by the onboard LED.

• Input Voltage: Ensure that the input voltage does not exceed the specified range to prevent damage to the module.
• Current Rating: Do not exceed the maximum charging current of 1A; select an appropriate resistor to set the desired charging current.
• Heat Dissipation: Provide adequate ventilation around the module as it may generate heat during operation.
• Battery Type: Use the module only with lithium-ion or lithium polymer batteries.
• Protection: Do not disable the onboard protection features as they are critical for battery safety.

• LED Not Lighting Up: Ensure the power supply is connected correctly and the battery is properly seated.
• Battery Not Charging: Check the battery connections and verify that the battery is not already fully charged or damaged.
• Module Overheating: Reduce the charging current if the module is too hot during operation.

• Check Connections: Verify all connections are secure and correct.
• Inspect Battery: Ensure the battery is in good condition and compatible with the module.
• Current Setting: Confirm the charging current is set correctly for your battery.

Q: Can I charge multiple batteries with this module? A: No, the TP4056 is designed for single-cell lithium-ion or lithium polymer batteries.

Q: What should I do if the module gets too hot? A: Reduce the charging current, ensure proper ventilation, and check for any shorts or excessive load on the output.

Q: How do I know when the battery is fully charged? A: The onboard LED will change its status, typically turning off or changing color, to indicate a full charge.

// There is no direct interaction code for the TP4056 with Arduino as it is a standalone charging module.
// However, you can monitor the battery voltage using Arduino's ADC.

const int batteryPin = A0; // Connect battery to A0 through a voltage divider

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(batteryPin);
  float voltage = sensorValue * (5.0 / 1023.0); // Convert the reading to voltage
  Serial.print("Battery Voltage: ");
  Serial.println(voltage);
  delay(1000); // Wait for a second between readings
}

Note: When measuring battery voltage, ensure that the voltage at the analog pin does not exceed 5V. Use a voltage divider if necessary to bring the voltage within a safe range for the Arduino ADC.