How to Use TP4056 + DW01: Examples, Pinouts, and Specs

The TP4056 + DW01 is a compact and efficient lithium-ion battery charging and protection module manufactured by Makers. It integrates the TP4056 linear battery charger IC with the DW01 battery protection IC, providing a complete solution for charging and safeguarding single-cell lithium-ion or lithium-polymer batteries. This module is widely used in portable electronics, DIY projects, and battery-powered devices due to its simplicity, reliability, and cost-effectiveness.

• Charging single-cell lithium-ion or lithium-polymer batteries
• Power banks and portable chargers
• Wearable devices and IoT gadgets
• DIY electronics projects
• Battery-powered tools and toys

1. Connect the Input Voltage:

   • Connect a 5V DC power source (e.g., USB power supply) to the IN+ and IN- pins.
   • Ensure the input voltage is within the range of 4.5V to 6V to avoid damaging the module.

2. Connect the Battery:

   • Attach the positive terminal of the lithium-ion battery to the BAT+ pin.
   • Attach the negative terminal of the battery to the BAT- pin.

3. Connect the Load (Optional):

   • If you want to power a load while charging the battery, connect the load to the OUT+ and OUT- pins.

4. Adjust the Charging Current (Optional):

   • The default charging current is set to 1A. To adjust it, replace the onboard resistor (Rprog) with a different value:
     • Charging current (Icharge) = 1200V / Rprog (in ohms).
     • For example, use a 2kΩ resistor for a charging current of 600mA.

5. Monitor the Charging Status:

   • Observe the onboard LEDs to determine the charging status:
     • Red LED: Charging in progress.
     • Blue LED: Charging complete.

• Battery Compatibility: Use only single-cell lithium-ion or lithium-polymer batteries with a nominal voltage of 3.7V.
• Heat Dissipation: The module may heat up during operation. Ensure proper ventilation or heat sinking if necessary.
• Input Voltage: Avoid exceeding the maximum input voltage of 6V to prevent damage to the module.
• Load Current: Do not exceed the module's maximum output current (1A) to ensure safe operation.

The TP4056 + DW01 module can be used to power an Arduino UNO from a lithium-ion battery. Below is an example of how to connect the module and monitor the battery voltage using the Arduino.

1. Connect the OUT+ and OUT- pins of the TP4056 module to the Arduino's VIN and GND pins, respectively.
2. Connect the battery to the BAT+ and BAT- pins of the module.
3. Connect a 5V USB power source to the IN+ and IN- pins for charging.

// Example code to monitor battery voltage using Arduino UNO
const int batteryPin = A0; // Analog pin connected to battery voltage divider
float voltageDividerRatio = 2.0; // Adjust based on your resistor values

void setup() {
  Serial.begin(9600); // Initialize serial communication
  pinMode(batteryPin, INPUT); // Set battery pin as input
}

void loop() {
  int analogValue = analogRead(batteryPin); // Read analog value
  float batteryVoltage = (analogValue * 5.0 / 1023.0) * voltageDividerRatio;
  
  // Print battery voltage to the Serial Monitor
  Serial.print("Battery Voltage: ");
  Serial.print(batteryVoltage);
  Serial.println(" V");
  
  delay(1000); // Wait for 1 second before the next reading
}

1. Module Overheating:

   • Cause: High input voltage or excessive charging current.
   • Solution: Ensure the input voltage is within the 4.5V to 6V range. Reduce the charging current by replacing the Rprog resistor.

2. Battery Not Charging:

   • Cause: Incorrect wiring or damaged battery.
   • Solution: Double-check all connections. Verify the battery is functional and compatible with the module.

3. No LED Indicator:

   • Cause: No input power or faulty module.
   • Solution: Confirm the input voltage is present. Replace the module if necessary.

4. Load Not Powering On:

   • Cause: Insufficient battery charge or excessive load current.
   • Solution: Fully charge the battery and ensure the load current does not exceed 1A.

Q: Can I use the TP4056 module to charge multiple batteries in series?
A: No, the TP4056 + DW01 is designed for single-cell batteries only. Charging multiple batteries in series requires a specialized charger.

Q: How do I adjust the charging current?
A: Replace the onboard Rprog resistor with a different value. Use the formula Icharge = 1200V / Rprog to calculate the desired charging current.

Q: Can I use the module without a battery connected?
A: Yes, the module can power a load directly from the input voltage, but this is not recommended for long-term use.

Q: What happens if the battery is over-discharged?
A: The DW01 protection IC will disconnect the battery to prevent damage. Reconnect the battery to a charger to restore functionality.