Linear Technology's LT3651EUHE-4.1#PBF Battery Charger

The LT3651EUHE-4.1#PBF is a highly efficient, single-cell, 4.1V lithium-ion/polymer battery charger designed by Linear Technology. This product offers a compact and reliable solution for various portable electronic applications. With its advanced features and performance, the LT3651EUHE-4.1#PBF ensures safe and efficient charging, making it an ideal choice for designers looking to extend battery life and maximize power efficiency.

This particular model integrates a precise 4.1V float voltage with a tolerance of ±0.5%, which is critical for ensuring the longevity and performance of lithium-based batteries. It supports a wide input voltage range from 4.95V to 32V, which is beneficial for applications that experience wide input voltage variations or require the charger to operate with automotive or industrial power supplies.

The LT3651EUHE-4.1#PBF boasts programmable charge current up to 2A, allowing the user to customize the charge rate to match the specifications of the battery being used. Additionally, it features a charge current monitor, which is useful for accurately determining the battery charge state and for providing an indication of charge progress.

This charger is designed with safety in mind, incorporating features such as thermal regulation, which protects the charger by reducing charge current if an internal temperature threshold is exceeded. Moreover, it has an automatic recharge feature, which initiates a new charge cycle if the battery voltage falls below a certain threshold, ensuring the battery remains fully charged.

The LT3651EUHE-4.1#PBF is available in a compact 16-lead QFN package, making it suitable for space-constrained applications. It also includes a C/10 charge termination and an onboard timer, which provides a fixed-duration top-off timer to terminate the charge cycle. These features, combined with its robust design, make the LT3651EUHE-4.1#PBF a versatile and reliable solution for modern battery charging needs.