Overview of the LT3651IUHE-8.4#PBF

The LT3651IUHE-8.4#PBF is a highly efficient, single-cell Li-Ion/Polymer battery charger produced by Linear Technology, a leading manufacturer in the design of high-performance analog integrated circuits. This advanced charging device is designed to cater to a wide range of applications, including portable electronics, industrial and medical equipment, and automotive systems, where reliable and efficient battery charging is essential.

Key Features

• Precision Charging: The LT3651IUHE-8.4#PBF is capable of delivering up to 2A of charge current and offers a final float voltage accuracy of ±0.5% at 25°C, ensuring precise charging of your battery.
• Programmable Charge Rate: The charging current is programmable via a single resistor, providing flexibility and convenience to suit various battery capacities and requirements.
• Wide Input Voltage Range: With an operating input voltage range from 4.95V to 32V, it can accommodate a variety of power sources, from low-voltage USB connections to higher voltage power supplies.
• Multi-Stage Charging: The charger employs a three-stage charging algorithm, including preconditioning, constant current, and constant voltage phases, to ensure the battery is charged efficiently and safely.
• Thermal Regulation: To protect against overheating, the LT3651IUHE-8.4#PBF integrates thermal regulation, which automatically reduces charge current when the internal temperature limit is approached.

Protection Features

• Reverse Battery Protection: The device prevents damage to the charger if the battery is accidentally connected in reverse.
• Overvoltage Protection: It also offers overvoltage protection, safeguarding both the battery and the charger from excessive input voltage.
• No Battery Drain: When the input supply is removed, the LT3651IUHE-8.4#PBF ensures that there is no battery drain, preserving the battery's charge.

Package and Temperature Range

The LT3651IUHE-8.4#PBF is available in a compact QFN-24 package, which is suitable for space-constrained applications. It is designed to operate over a temperature range of -40°C to 125°C, making it reliable for use in extreme environmental conditions.

Conclusion

In summary, the LT3651IUHE-8.4#PBF from Linear Technology is a versatile and robust battery charger that offers precision, flexibility, and protection, making it an ideal solution for a wide array of single-cell Li-Ion/Polymer battery charging applications.