Lithium Battery Charging Unit TP4056

The TP4056 is a highly integrated lithium-ion battery charger IC for single-cell lithium batteries. With its wide range of features and excellent performance, it has become a preferred choice in numerous applications. This chip can charge a single-cell battery at a constant current of up to 1A with a constant voltage of 4.2V. The output current can be adjusted using an external resistor, providing versatility for different battery sizes.

Key Features

• Constant Current/Constant Voltage (CC/CV) Operation: The TP4056 operates in a constant current/constant voltage mode, ensuring safe and efficient charging of lithium batteries.
• Built-in Battery Temperature Detection: The device includes a built-in thermistor pin to enable temperature monitoring and prevent overheating during the charging process.
• Low Power Consumption: With a quiescent current of around 80μA, the TP4056 is an efficient choice for battery-powered applications.
• Under-voltage Lockout: The device features under-voltage lockout functionality, which helps protect the battery from deep discharge and extends battery life.
• LED Indicator: The chip supports LED indicators to show charging status, providing users with clear visual feedback.

Applications

The TP4056 is suitable for a variety of applications, including:

• Smartphones and Tablets
• Portable Power Banks
• Wearable Devices
• Robotics
• DIY Electronics Projects

Energy

The TP4056 is designed to work with single-cell lithium-ion batteries. It provides an efficient charging solution that significantly reduces energy waste. By providing a wide input voltage range (from 4.5V to 5.5V), it easily adapts to various power sources such as USB chargers, wall adapters, or solar panels.

How to Use

To use the TP4056, follow these steps:

1. Connect the input voltage to the IN pin and ground to GND.
2. Connect the battery to the BAT pin, ensuring the correct polarity.
3. Optionally, connect a resistor to the PROG pin to set the desired charging current.
4. Attach a thermistor to the TS pin to enable temperature monitoring if required.
5. Connect a status LED to indicate charging (optional).

The TP4056 is easy to integrate into any design, thanks to its small footprint and straightforward application circuit.

Datasheet

For detailed specifications, pin configurations, and application notes, please refer to the TP4056 Datasheet.