How to Use TP4056 Type-C: Examples, Pinouts, and Specs

The TP4056 Type-C is a lithium battery charger IC designed for charging single-cell lithium-ion batteries. It provides a constant current/constant voltage (CC/CV) charging profile, ensuring safe and efficient charging. The inclusion of a Type-C interface allows for modern connectivity and reliable power delivery, making it a popular choice for portable electronics, DIY projects, and battery-powered devices.

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

The TP4056 Type-C module is compact and highly efficient. Below are its key technical details:

The TP4056 Type-C module has several pins and solder pads for connectivity. Below is a detailed description:

1. Power Input: Connect a 5V power source (e.g., USB Type-C adapter) to the IN+ and IN- pins. Ensure the input voltage is within the 4.5V to 5.5V range.
2. Battery Connection: Connect the lithium-ion battery to the BAT+ and BAT- pins. Ensure correct polarity to avoid damage.
3. Load Connection (Optional): If you want to power a load directly, connect it to the OUT+ and OUT- pins. Note that the load should not exceed the module's current rating.
4. Set Charging Current: Use a resistor on the PROG pin to set the desired charging current. The formula is: [ I_{CHARGE} = \frac{1200}{R_{PROG}} ] For example, a 1.2kΩ resistor sets the charging current to 1A.
5. Status LEDs: Connect LEDs to the STAT1 and STAT2 pins for visual feedback:
   • STAT1: Lights up during charging.
   • STAT2: Lights up when charging is complete.

• Battery Protection: Use a lithium battery with a built-in protection circuit to prevent overcharging, over-discharging, and short circuits.
• Heat Dissipation: The module may heat up during operation. Ensure proper ventilation or add a heatsink if necessary.
• Avoid Reverse Polarity: Double-check all connections to avoid damaging the module or the battery.
• Charging Current: Do not exceed the recommended charging current for your battery to ensure safety and longevity.

The TP4056 Type-C can be used to charge a battery that powers an Arduino UNO. Below is an example of how to monitor the charging status using Arduino:

// TP4056 Status Monitoring with Arduino UNO
// Connect STAT1 to Arduino pin 2 and STAT2 to pin 3

const int stat1Pin = 2; // STAT1 pin connected to Arduino pin 2
const int stat2Pin = 3; // STAT2 pin connected to Arduino pin 3

void setup() {
  pinMode(stat1Pin, INPUT); // Set STAT1 as input
  pinMode(stat2Pin, INPUT); // Set STAT2 as input
  Serial.begin(9600);       // Initialize serial communication
}

void loop() {
  int stat1 = digitalRead(stat1Pin); // Read STAT1 pin
  int stat2 = digitalRead(stat2Pin); // Read STAT2 pin

  if (stat1 == LOW) {
    Serial.println("Charging in progress...");
  } else if (stat2 == LOW) {
    Serial.println("Charging complete!");
  } else {
    Serial.println("No battery connected or idle state.");
  }

  delay(1000); // Wait for 1 second before checking again
}

1. Module Overheating

   • Cause: High charging current or poor ventilation.
   • Solution: Reduce the charging current by increasing the PROG resistor value. Ensure proper airflow around the module.

2. Battery Not Charging

   • Cause: Incorrect wiring or damaged battery.
   • Solution: Verify all connections and ensure the battery is functional. Check the input voltage.

3. LEDs Not Lighting Up

   • Cause: Faulty LEDs or incorrect connections.
   • Solution: Test the LEDs separately and ensure they are connected to the correct pins with appropriate resistors.

4. Output Voltage Too Low

   • Cause: Battery is deeply discharged or damaged.
   • Solution: Allow the battery to charge for some time. If the issue persists, replace the battery.

• Can I use the TP4056 Type-C to charge multiple batteries in series?

  • No, the TP4056 is designed for single-cell lithium-ion batteries only. Charging multiple cells in series requires a specialized balance charger.

• What happens if I exceed the input voltage range?

  • Exceeding the 5.5V input voltage can damage the module. Always use a regulated 5V power source.

• Can I adjust the charging voltage?

  • No, the charging voltage is fixed at 4.2V ± 1% and cannot be adjusted.

• Is it safe to leave the battery connected after charging is complete?

  • Yes, the TP4056 automatically stops charging when the battery is full, preventing overcharging.

This concludes the documentation for the TP4056 Type-C module. Follow the guidelines above for safe and efficient operation!