Looking for a compact, efficient, and safe lithium battery charging solution for your portable electronics? AXTEK’s AX4056 is your go-to choice. This integrated linear charger IC is specifically engineered for single-cell Li-Ion battery charging through USB or adapter input, making it perfect for space-constrained applications.

Key Features of AX4056

All-in-One Charging Solution

The AX4056 integrates a complete constant-current/constant-voltage (CC/CV) charging system with an internal power MOSFET and thermal regulation circuit. No external current-sense resistor, blocking diode, or MOSFET is required—just plug and play.

Programmable Charge Current Up to 1A
Configure your charging current by using a single resistor (RISET). With proper thermal layout, the AX4056 delivers up to 1000mA—ideal for power-hungry portable devices.

Precision Charging Control

• Fixed float voltage at 4.2V ±1%, ensuring safe and complete battery charging

• Intelligent three-stage charging: trickle → constant current → constant voltage

• Automatic charge termination and recharge function to keep the battery at optimal capacity

• Reverse battery connection protection

  
  

Ultra-Low Standby Power

In shutdown mode, the IC draws less than 1µA, helping to preserve battery life when not in use.

 Thermal Regulation for Safety
Built-in thermal feedback automatically adjusts charging current to prevent overheating under high ambient temperature or high load conditions.

Status Monitoring Made Easy
With two open-drain status output pins (STAT1 and STAT2), users can easily implement LED or system-level indicators for charging progress and fault detection.

Application Scenarios

The AX4056 is widely used in:

• Bluetooth headsets and wireless accessories

• MP3 players and portable media devices

• Smartphones and PDAs

• Digital cameras and wearable devices

• Small smart appliances and handheld tools

Packaging & Compliance

• ESOP-8 package for better heat dissipation and compact PCB layout

• Fully RoHS compliant and Pb-free, supporting global green initiatives

Why Choose AXTEK's AX4056?

Because great products start with great chips. The AX4056 brings together simplicity, efficiency, and safety—delivering reliable battery charging performance in even the most space-sensitive designs.

Contact us for datasheet, reference design, and technical support: sales01@axtekic.com