LT3650IDD-8.2#PBF - High Efficiency Li-Ion/Polymer Battery Charger

The LT3650IDD-8.2#PBF is a compact, highly efficient, single-cell lithium-ion/polymer battery charger produced by Linear Technology, designed to bring simplicity and advanced charging capabilities to portable and industrial applications. This feature-rich battery charger IC is engineered to deliver a precise 8.2V float voltage, ensuring optimal charging for single-cell lithium-ion/polymer batteries.

With its wide input voltage range of 4.95V to 32V, the LT3650 can accommodate a variety of power sources, from low voltage wall adapters to high voltage automotive inputs, without the need for an external regulator. This versatility makes it an excellent choice for diverse applications, whether it's integrated into portable consumer electronics or embedded in more demanding industrial systems.

The LT3650IDD-8.2#PBF offers a programmable charge current up to 2A, allowing designers to tailor the charging profile to specific battery capacities and thermal constraints. Its charge current is easily set with a single resistor, simplifying the design process. Moreover, the device features an innovative Bat-Track™ adaptive output control, which maximizes power efficiency and reduces power dissipation in the charging path.

Safety is a key concern when it comes to battery charging, and the LT3650 addresses this with multiple safety features. It incorporates an internal timer for termination, which can be set by an external capacitor, and it has an automatic recharge feature. Additionally, the charger provides NTC temperature sensing to protect the battery by suspending charging if it detects unsafe temperatures.

Other notable features include bad battery detection, an absence of battery indication, and C/10 charge termination. The IC also provides a charge status output that can be used to indicate charging progress or completion. All these capabilities are housed in a low-profile (0.75mm) 12-lead DFN package, ensuring a minimal footprint on the PCB.

The LT3650IDD-8.2#PBF is a robust and efficient solution for modern battery charging requirements, offering precision, flexibility, and safety for a wide range of applications.