LT8490IUKJ

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The LT8490IUKJ is a highly integrated linear charger for single-cell Li-Ion batteries. The device integrates many features including a built-in high accuracy 4.2V (4.35V) and 3.8V (3.67V) battery float voltages, over-voltage and over-current protections, safety timer, optional reverse current blocking capability, and soft-start circuitry. It also has adjustable input current limit capability.

The LT8490IUKJ is designed specifically for use in portable battery powered devices with limited space requirements and long battery run time. It can also be used in systems that require rapid, low-impedance charging, such as tablet computers and digital cameras.

The LT8490IUKJ is a highly advanced charger that combines the advantages of linear and switch-mode technologies. Linear technology provides a low, constant output current and high efficiency, while switch-mode technology provides high peak current capability and up to a 1A fast-charge current. The use of linear technology also provides a high-impedance, low-noise supply for sensitive onboard processor and memory circuits.

The LT8490IUKJ features true voltage regulation from input to output. This ensures the battery is maintained at a consistent, optimal floating voltage over a wide range of input voltage and temperature conditions. The device includes two independent over-voltage protection points which can be programmed for either 4.2V or 3.8V depending on the battery type. An optional reverse current blocking capability prevents reverse current flow when the battery voltage goes above the input voltage. The device also includes a thermal shutdown circuit to protect it against overload or excess temperatures.

The LT8490IUKJ also provides an extensive array of system control features that enable convenient battery charging control. It includes a separate timer module that provides safety protection if the charging process is interrupted. Other useful features like reverse current blocking, status and fault detection, and soft-start circuitry, provide added system flexibility and control.

The LT8490IUKJ is well-suited for a wide range of portable and consumer battery applications, including tablet computers, digital cameras, and other systems that require a high-efficiency, low-impedance charging solution. With its many features and control functions, the LT8490IUKJ is an ideal solution for battery charging systems.

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