Linear Technology LT3651EUHE-8.2#PBF Battery Charger IC

The LT3651EUHE-8.2#PBF is a highly efficient PowerPath™ manager and Li-Ion/Polymer battery charger designed by Linear Technology for automotive and industrial applications. This advanced integrated circuit (IC) is engineered to optimize battery health and extend battery life, offering a versatile solution for charging single-cell lithium batteries with precision and safety.

With its wide input voltage range of 4.95V to 32V, the LT3651EUHE-8.2#PBF is capable of operating in a variety of challenging environments and can handle high voltage transients, making it ideal for automotive applications where input voltages can be unpredictable. Moreover, it provides a constant-current/constant-voltage charge characteristic with maximum charge current programmability up to 2A, which allows for fast and efficient charging of the connected battery.

The device features an innovative charge cycle termination based on selectable minimum charge current, ensuring the battery is not overcharged, which can extend the battery's lifespan. Additionally, it incorporates a programmable float voltage with ±0.5% accuracy, set at 8.2V for the LT3651EUHE-8.2#PBF variant, which ensures the battery is charged to its precise required voltage.

Thermal regulation is another key aspect of the LT3651EUHE-8.2#PBF, which protects the IC from overheating by reducing charge current during high temperature conditions. It also offers an NTC thermistor input that allows temperature qualified charging, providing an extra layer of safety and reliability.

For added convenience, the IC includes a C/10 charge termination indicator and an auto-restart feature for less than optimal battery insertions or shorted battery conditions. It is available in a 20-lead QFN package, ensuring a compact footprint for space-constrained applications.

Overall, the LT3651EUHE-8.2#PBF from Linear Technology is a robust, feature-rich battery charging solution that provides safety, efficiency, and precision, making it an excellent choice for designers looking to integrate reliable battery management into their automotive or industrial applications.