The PJ4054MR is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. It is designed to provide a simple and efficient charging solution in a compact package.

Applications

• Portable Media Players
• Wireless Headphones
• Low-Power Embedded Systems
• Wearable Devices
• USB-Powered Chargers

Features

• Constant-Current/Constant-Voltage Operation
• Programmable Charge Current: Allows for tailoring the charge current to the specific battery requirements.
• Thermal Feedback Regulation: Protects the battery and charger from overheating during high charge current phases.
• Preset 4.2V Charge Voltage: Ensures the battery is charged to its optimal voltage level.
• Automatic Recharge: Automatically restarts the charging process when the battery voltage drops below a certain threshold.
• Short Circuit Protection: Provides protection against short circuits, preventing damage to the charger and battery.
• SOT23-5 Package: Small form factor makes it suitable for space-constrained applications.

Benefits

• Simplified Charging Circuit: Requires minimal external components, reducing the complexity and cost of the overall circuit.
• Safe and Reliable Charging: Thermal feedback and short circuit protection features ensure safe and reliable battery charging.
• Compact Size: SOT23-5 package allows for integration into small portable devices.
• Extended Battery Life: By charging the battery correctly and safely, the PJ4054MR helps to extend the overall lifespan of the battery.

The PJ4054MR is a versatile and reliable charger IC suitable for a wide range of portable applications. Its integrated features and small size make it a popular choice among design engineers.