LTC4068EDD-4.2#PBF - Standalone Linear Li-Ion Battery Charger with Thermal Regulation

The LTC4068EDD-4.2#PBF is a highly integrated standalone linear battery charger designed by Linear Technology for single-cell lithium-ion batteries. This compact device simplifies the charging process by incorporating an array of features aimed at efficient and reliable battery management. The LTC4068EDD-4.2#PBF is an ideal charging solution for portable electronic devices such as digital cameras, MP3 players, and Bluetooth headsets.

This battery charger is capable of autonomously charging a single-cell Li-Ion battery without the need for external charge control circuitry. The charging voltage is fixed at 4.2 volts, which is the optimal charging voltage for most Li-Ion cells, ensuring a full charge without overcharging, which can extend battery life and maintain safety. The device operates over a wide input voltage range and can draw power from USB ports as well as wall adapters.

One of the key features of the LTC4068EDD-4.2#PBF is its thermal regulation capability, which maximizes the charge rate without the risk of overheating. This is particularly beneficial in compact electronic devices where thermal management is crucial. The thermal feedback automatically adjusts the charge current to limit the die temperature during high power operation or high ambient temperature conditions.

The device also includes an automatic recharge feature. Once the battery voltage falls below an internal threshold, the charger will initiate a new charging cycle, ensuring that the battery remains fully charged when the system is connected to a power source. Additionally, the LTC4068EDD-4.2#PBF features a charge status output that can be used to drive an external LED, providing a visual indication of the charging process.

For safety, the LTC4068EDD-4.2#PBF incorporates multiple protection features such as overvoltage protection, thermal shutdown, and a programmable timer to terminate the charge cycle. The device is available in a small, low-profile (3mm x 3mm) DFN package, making it an excellent choice for space-constrained applications.

In summary, the LTC4068EDD-4.2#PBF from Linear Technology is a versatile and robust battery charging solution that offers ease of integration, advanced thermal management, and comprehensive safety features for effective single-cell Li-Ion battery charging in portable electronic devices.