The TP4056 is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion and lithium polymer batteries. Its SOP package and low external component count make the TP4056 ideally suited for portable applications. Furthermore, the TP4056 can work within USB and wall adapter power specifications. Common applications include portable devices, like DIY projects, microcontroller boards, and standalone battery chargers.
This circuit consists of a TP4056 module connected to a 3.7V LiPo battery, providing a charging interface for the battery. The TP4056 manages the charging process by connecting its B+ and B- pins to the battery's positive and ground terminals, respectively.
Open Project in Cirkit Designer
This circuit is a battery-powered system featuring an ESP32 microcontroller that controls an OLED display, a motor driver for two hobby motors, an ultrasonic sensor for distance measurement, and a DFPlayer Mini for audio output through a loudspeaker. The TP4056 module manages battery charging, and a step-up boost converter provides a stable 5V supply to the components.
Open Project in Cirkit Designer
This circuit is a data acquisition and communication system powered by a LiPoly battery and managed by a Raspberry Pi Pico. It includes sensors (BMP280, MPU9250) for environmental data, a GPS module for location tracking, an SD card for data storage, and a WLR089-CanSAT for wireless communication. The TP4056 module handles battery charging, and a toggle switch controls power distribution.
Open Project in Cirkit Designer
This circuit is designed to control the speed of a motor using a PWM motor speed controller powered by a Lithium-Ion battery. The TP4056 module manages battery charging, while a step-up boost converter regulates the voltage supplied to the motor and an Elektro Pad. A rocker switch is included to control the power flow to the motor speed controller.
Open Project in Cirkit Designer| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | BAT | Battery positive connection |
| 2 | GND | Ground connection |
| 3 | VCC | Input power supply (4.5V-5.5V) |
| 4 | TEMP | Temperature sense (optional) |
| 5 | PROG | Charge current programming pin |
| 6 | STAT | Charge status output pin |
Icharge = 1200 / Rprog (mA), where Rprog is in ohms.Q: Can I charge multiple batteries with one TP4056 module? A: No, the TP4056 is designed for single-cell lithium-ion or lithium polymer batteries.
Q: What should I do if the TP4056 is getting too hot during charging? A: Ensure that the charging current is not set too high for your application. Consider adding a heat sink or reducing the charge current.
Q: Can the TP4056 be used without the temperature sensing pin? A: Yes, the TEMP pin is optional. If not used, it should be left unconnected.
The following example demonstrates how to read the charge status from the TP4056 using an Arduino UNO.
// Define the STAT pin connected to the Arduino
const int STATpin = 7;
void setup() {
pinMode(STATpin, INPUT);
Serial.begin(9600);
}
void loop() {
// Read the charging status from the STAT pin
int chargeStatus = digitalRead(STATpin);
// Check if the battery is still charging
if (chargeStatus == LOW) {
Serial.println("Battery is charging...");
} else {
Serial.println("Battery is fully charged or no battery connected.");
}
// Wait for a second before reading the status again
delay(1000);
}
This code sets up the Arduino to read the charge status from the TP4056 and print the status to the Serial Monitor. The STATpin should be connected to the STAT pin on the TP4056 module, and the Arduino's ground should be connected to the module's GND pin.