Linear Technology's LTC4058EDD-4.2#PBF Battery Charger

The LTC4058EDD-4.2#PBF is a high-efficiency, single-cell, lithium-ion battery charger designed by Linear Technology to provide a reliable charging solution for portable electronic devices. This advanced charger is housed in a small 10-lead DFN package, making it an excellent choice for space-constrained applications.

With a programmable charge current up to 750mA, the LTC4058EDD-4.2#PBF can rapidly charge batteries from a variety of sources, including USB ports and wall adapters. It operates over a wide input voltage range from 4.25V to 6.5V, ensuring compatibility with various power supplies.

The LTC4058EDD-4.2#PBF features a charge current monitor, which allows for accurate measurement of the charge current and provides a means for charge termination. Additionally, it includes an internal thermal feedback mechanism that optimizes the charge rate for any given temperature condition, protecting both the battery and the charger from overheating.

Another notable feature is the automatic recharge capability. Once the battery voltage falls below a preset threshold after a full charge, the LTC4058EDD-4.2#PBF automatically initiates a new charging cycle, ensuring that the connected battery remains fully charged and ready for use.

For enhanced safety and battery longevity, this charger incorporates several protection features. It offers overvoltage protection to prevent charging at unsafe voltage levels, and its charge termination is based on a programmable charge timer or the C/10 rule, which stops the charging process when the current falls to one-tenth of the programmed value.

Furthermore, the LTC4058EDD-4.2#PBF supports a no-battery present detection feature, which reduces the drain on the input supply when no battery is connected. This is particularly useful in extending the shelf life of the product it powers.

Overall, the LTC4058EDD-4.2#PBF from Linear Technology is a compact, highly integrated, and efficient solution for charging single-cell lithium-ion batteries in portable electronic devices, combining performance with a range of safety and convenience features.