The TP4056 is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its small size and low external component count make it ideal for portable applications. The TP4056 features a thermal feedback regulation system that reduces the charge current during high power operation or high ambient temperatures to maximize the charge rate and prevent over-heating risks. It does not feature reverse polarity protection.

Applications

• MP3 Players
• Bluetooth Applications
• Portable Devices
• Mobile Phones
• Lithium-Ion Battery Chargers

Features

• Programmable Charge Current
• Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
• Charges Single Cell Li-Ion Batteries Directly from USB Port
• Preset 4.2V Charge Voltage with 1.5% Accuracy
• Automatic Recharge
• Charge Status Output
• C/10 Termination
• 2.9V Trickle Charge Threshold
• Soft-Start Limits Inrush Current
• Available without Reverse Polarity Protection
• Available in 8-Lead SOIC Package

Benefits

• Simple to Use: Requires few external components, simplifying design.
• Thermal Protection: Prevents overheating, increasing reliability.
• Accurate Charging: Ensures the battery is charged to its optimal voltage level for maximum life.
• Cost-Effective: Low component count keeps material costs low.
• Compact Design: Small size is ideal for space-constrained applications.

Technical Specifications

The TP4056 operates with an input voltage range of 4.5V to 5.5V. It offers a programmable charge current from 100mA to 1000mA via an external resistor. The charge voltage is preset to 4.2V with an accuracy of ±1.5%. It has a trickle charge threshold of 2.9V and a charge termination current set at C/10. The operating temperature ranges from -40°C to 85°C.