TP4057 4.2V LITHIUM-ION BATTERY CHARGER IC SOT-23-6

The TP4057 is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. It is specifically designed for portable applications and operates with minimal external components. The TP4057 can automatically adjust the charging current and voltage, providing a reliable and efficient charging solution for 4.2V lithium-ion batteries. Its compact SOT-23-6 package makes it suitable for space-constrained designs.

Key Features of TP4057 4.2V Lithium-Ion Battery Charger IC:

• • High Accuracy: Provides accurate battery voltage regulation with a 4.2V ±1% constant voltage, ensuring safe and effective charging.
  • Constant-Current/Constant-Voltage Charging: Supports CC/CV charging methods, which are ideal for lithium-ion batteries.
  • Automatic Charge Termination: Automatically terminates the charge cycle when the current drops to 1/10th of the programmed value after reaching the final float voltage.
  • Thermal Regulation: Features internal thermal regulation to limit the charging current when the chip’s temperature exceeds a safe threshold.
  • Built-in Protection: Includes battery overvoltage protection, reverse current blocking, and automatic recharge, enhancing battery safety and longevity.
  • LED Charge Status Indicator: Provides a simple interface for charge status indication using an external LED.
  • Compact Design: Comes in a small SOT-23-6 package, making it ideal for compact and portable devices.

Technical Specifications of TP4057 4.2V Lithium-Ion Battery Charger IC:

• • Model: TP4057
  • Charging Voltage: 4.2V ±1%
  • Charging Current: Programmable up to 500mA
  • Input Voltage: 4.35V to 6.5V
  • Termination Current: 1/10 of the programmed charging current
  • Operating Temperature Range: -40°C to 85°C
  • Package: SOT-23-6
  • Pin Count: 6 pins

Mechanical Specifications of TP4057 4.2V Lithium-Ion Battery Charger IC:

• • Package Type: SOT-23-6
  • Dimensions: Approximately 2.9 mm x 1.6 mm
  • Marking: 57b0
  • Pin Configuration:
  • 1: BAT – Battery connection terminal
  • 2: GND – Ground
  • 3: VCC – Input voltage
  • 4: PROG – Charging current program, set with an external resistor
  • 5: CHRG – Charge status indicator (open-drain)
  • 6: STDBY – Standby mode status indicator

Schematic Diagram, Connection, Wiring, and Pinout of TP4057 4.2V Lithium-Ion Battery Charger IC:

• • Basic Wiring: Connect the VCC pin to the power supply (4.35V to 6.5V), the BAT pin to the battery positive terminal, and GND to the ground. Use a resistor between the PROG pin and ground to set the desired charging current. An LED can be connected to the CHRG pin for charge status indication.
  • Example Circuit: For a 500mA charging current, connect a 2kΩ resistor between the PROG pin and ground.

Applications of TP4057 4.2V Lithium-Ion Battery Charger IC:

• • Portable Devices: Used in mobile phones, tablets, and other portable electronic devices requiring reliable battery charging solutions.
  • Wearable Electronics: Suitable for charging lithium-ion batteries in wearable devices due to its compact size and low power requirements.
  • Battery-Powered Projects: Ideal for DIY electronics projects that involve lithium-ion battery management and charging.
  • Power Banks: Commonly used in power banks and backup battery packs for regulated charging of lithium-ion cells.

Equivalent of TP4057 4.2V Lithium-Ion Battery Charger IC:

• • TP4056: A similar battery charger IC with an integrated power MOSFET, also available in SOT-23-6 package.
  • LP2951: Another low-dropout voltage regulator with comparable performance for battery charging applications.

Keywords for TP4057 4.2V Lithium-Ion Battery Charger IC:

• • TP4057
  • Battery Charger IC
  • Lithium-Ion Charger
  • 4.2V Charger
  • CC/CV Charging

Package Includes:

• • 1 x TP4057 4.2V Lithium-Ion Battery Charger IC (SOT-23-6)