MAX8814ETA+T

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The MAX8814ETA+T is an advanced, PTC protected, multi-chemistry battery charger IC optimized for space-constrained applications. This IC enables the design of small, low-cost, quick-charging portable devices while providing a safe charging environment. As a battery charger of a Power Management IC (PMIC), the MAX8814ETA+T provides optimal charging performance, offering multiple input sources and adjustable charge capabilities with high accuracy and flexibility. This article will discuss the application fields and working principles of the MAX8814ETA+T.

Application Fields

The MAX8814ETA+T can be used in a variety of portable applications, such as mobile phones, digital cameras, music players, and hand-held gaming devices. This IC can support a wide range of battery types, including standard Li-Ion, Li-Ion Polymer, and NiCad, to provide charging capabilities with up to 4.2V/25mA charge current. It comes with a USB interface, enabling it to be used in USB-based applications, such as USB-powered PDAs and smartphones. Additionally, the MAX8814ETA+T has a fast-charge feature, allowing batteries to be charged quickly, while also providing an excellent thermal management solution which prevents the IC from heating up. Finally, this IC has an integrated selectable power - supply, allowing the design of power-efficient multi-chemistry charge pumps.

Working Principle

The MAX8814ETA+T works by providing charge control and protection features to prevent over-charging or short-circuiting of the battery. This IC has two input pins for power sources, with either signal selected by the built-in multiplexer. When enabled, the MAX8814ETA+T will regulate the voltage of the battery, keeping it within its optimal range, while monitoring the current and temperature of the battery. When the battery is charged or the temperature reaches a certain level, the IC will automatically shut down the charging circuit to prevent any damage. Additionally, the MAX8814ETA+T contains a power-on reset function, which prevents any malfunction should the battery charge drastically drop due to a power failure. The IC is also protected by an over-voltage protection feature, which will stop the charging process in the event of an excessively high voltage.

The MAX8814ETA+T also has adjustable charging capabilities, with the charge status displayed via two status GPIO outputs. This IC provides an adjustable charge current of up to 25mA, which can be selected via the programming resistor. Additionally, the IC has an adjustable charge voltage ranging from 2.5V to 4.2V, allowing the user to select the optimal level of charging depending on the battery type being used. Furthermore, the MAX8814ETA+T has an integrated power-supply regulator to provide the power source for the battery, allowing the charger IC to be used with a variety of battery types.

Conclusion

The MAX8814ETA+T is an advanced, PTC protected, multi-chemistry battery charger IC that is optimized for space-constrained applications. It features a USB interface, allowing it to be used in USB-based applications, as well as an adjustable charge current of up to 25mA and adjustable charge voltage ranging from 2.5V to 4.2V. It also has a power-on reset function and an over-voltage protection feature to ensure safe charging of the battery. With its advanced features, the MAX8814ETA+T is an ideal choice for powering portable devices.

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