**LT8490EUKJ#PBF: A High-Efficiency, Wide-Input Voltage Buck-Boost Battery Charger IC**

The **LT8490EUKJ#PBF** from Analog Devices is a sophisticated monolithic buck-boost switching battery charger controller IC designed to manage a remarkably wide input voltage range from **6V to 80V**. This capability makes it an exceptionally versatile solution for diverse applications, including automotive, industrial, and solar-powered systems, where input sources can be highly variable and often exceed or fall below the battery's voltage.

A core strength of the LT8490 lies in its **advanced constant-current constant-voltage (CC-CV) charging algorithm** with maximum power point tracking (MPPT). This feature is particularly crucial for solar applications, as it ensures the charger extracts the maximum available power from a photovoltaic panel to charge the battery, significantly optimizing energy harvest under varying light conditions. The IC supports charging for a variety of battery chemistries, including **Lithium-ion/Polymer, sealed lead-acid (SLA), and LiFePO4**, with the charging parameters easily configurable via external resistors.

Efficiency is a paramount design goal, and the LT8490 achieves this through its **synchronous buck-boost architecture with 4 integrated MOSFET switches**. This topology allows for seamless transitions between buck, boost, and buck-boost operating modes, ensuring optimal efficiency regardless of whether the input voltage is above, below, or equal to the battery voltage. The result is **minimal heat generation** and extended battery life.

The device offers extensive programmability and protection features. Key parameters such as charging current, float voltage, and termination thresholds can be set with external components. A comprehensive suite of **protection features includes input and battery reverse-polarity protection, overvoltage and overcurrent safeguards, and thermal shutdown**, ensuring robust and reliable operation in harsh environments. Its compact 7mm x 7mm 64-lead QFN package is suitable for space-constrained designs.

**ICGOODFIND**: The LT8490EUKJ#PBF stands out as a premier solution for demanding battery charging applications. Its **extremely wide 6V to 80V input range**, integrated MPPT for solar charging, high efficiency across all operating modes, and robust protection features make it an indispensable component for engineers designing systems that require reliable and intelligent power management from unstable or widely varying sources.

**Keywords**: Buck-Boost Charger, Wide Input Voltage, Maximum Power Point Tracking (MPPT), Constant-Current Constant-Voltage (CC-CV), Battery Management.