AD7284WBSWZ-RL

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The AD7284WBSWZ-RL is a versatile and compact power management IC (PMIC) that provides numerous integrated functions needed to design efficient handheld devices and battery-powered equipment. In particular, it offers robust multi-chemistry battery management, with direct-connection to two series Li-Ion cells and can wake-up from standby with power gating. It also provides adequate current limits, reverse battery protection, and trickle charge. This article discusses the application field and working principle of the AD7284WBSWZ-RL PMIC, with a particular focus on its battery management features.

Application Field

The AD7284WBSWZ-RL is mainly used in mobile handheld devices such as smartphones and tablets as well as many other types of battery-powered equipment. It also offers safety features including over-current protection, reverse battery protection, and trickle charging for safe charging of Li-ion batteries. Moreover, its on board regulators provide both linear and buck-boost voltage conversion from a single Li-ion battery cell, making it ideal for powering low-voltage systems and providing a wide output range.

Working Principle

The AD7284WBSWZ-RL is an integrated power management solution designed to efficiently manage multiple Li-ion cells. It contains an independent power switch, voltage converter, and automatic cell switching (ACS) feature. The ACS function enables the device to automatically switch the cells when different power sources are detected, such as when one cell is depleted and another is available. Additionally, the device can wake up from standby with its power gating feature and has several safety features including reverse battery protection, one-cell detection, and over-current protection.

The power switch allows for efficient power management by allowing only active current to flow through to the system and reducing power consumption through efficient power switching. The voltage converter is used to convert one Li-ion cell voltage to the load voltage, and the ACS allows for automatic switching of cells in case of one cell being depleted. Additionally, the AD7284WBSWZ-RL has a trickle charge feature that allows for safe charging by ensuring that the majority of the current is directed to the dead cell rather than the live cell.

Conclusion

In conclusion, the AD7284WBSWZ-RL is a top-of-the-line PMIC featuring integrated battery management which is designed to provide a safe and efficient solution for powering handheld mobile devices and other battery-powered equipment. It is a versatile device that offers multiple power functions, reverse battery protection, and trickle charge, making it ideal for powering various kinds of low-voltage systems.

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