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Datasheet
Compact Single-Cell Lithium-Ion Battery Charger IC with 600mA Charging Current for Portable Electronics
The TP4065-4.2V-SOT235 is a linear battery charging IC designed for safe and efficient charging of single-cell lithium-ion and lithium-polymer batteries. This charger IC provides a constant current / constant voltage (CC/CV) charging profile with a fixed 4.2V regulation voltage, ensuring reliable and accurate battery charging. Its compact SOT-23-5 package makes it suitable for space-constrained portable devices such as wearables, IoT modules, and handheld electronics.
The device supports programmable charging current up to 600mA using an external resistor, allowing designers to optimise charging speed according to battery capacity and thermal limits. With integrated thermal regulation, automatic recharge, and charge status indication, the TP4065 simplifies lithium battery charging circuit design while improving battery safety and longevity. It is commonly used in USB-powered battery charging systems and compact battery-powered consumer electronics.
Key Features
- Single-Cell Lithium Battery Charger – Designed for Li-ion and Li-polymer batteries.
- Fixed 4.2V Charge Regulation – Provides accurate constant voltage charging.
- Programmable Charging Current – Supports charging current up to 600mA using an external resistor.
- Constant Current / Constant Voltage Charging – Ensures safe and efficient battery charging cycle.
- Integrated Thermal Regulation – Prevents overheating during high current charging.
- Automatic Recharge Function – Restarts charging when battery voltage drops below threshold.
- Charge Status Output – Provides charging and charge-complete indication.
- Compact SOT-23-5 Package – Ideal for small portable electronic designs.
