BQ24705RGERG4

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Battery-powered Electronic devices have become increasingly popular, leading to high demand for efficient battery chargers. A battery charger is a power supply designed to charge a secondary cell or rechargeable battery by forcing an electric current through it. The BQ24705RGERG4 is a Battery Charger Power Management Integrated Circuit (PMIC) that offers the necessary protections and features to safely and quickly charge a battery pack. In this article, the application fields and working principles of the BQ24705RGERG4 will be discussed.

Application Fields

The BQ24705RGERG4 is primarily used in portable consumer electronic systems such as smartphones, tablets and laptops. It can also be used in Home IoT devices and Automotive applications. This PMIC supports most battery chemistries, such as Li-Ion, Li-Pol, NiCd and NiMH, making it suitable for a wide range of applications. Additionally, the IC features average current based charging, allowing for an efficient and fast charging process regardless of the battery voltage.

The circuit also offers an array of protections such as over-voltage, over-current, under voltage and over temperature, allowing for a safe and reliable charging process. Additionally, the IC features programmable charging profiles and a USB Type-C reversible power supply port. This makes it suitable for quick plug-and-charge solutions.

Working Principle

The BQ24705RGERG4 is a fully integrated battery charger IC capable of charging single-cell Li-ion or Li-polymer battery packs. The IC is controlled by a separate microcontroller and can be powered by either an AC adapter or a USB port. It\'s also equipped with 3-stage charge control that allows for efficient charging according to the battery pack voltage.

When attached to an AC adapter or a USB port, the charge current is set at a fixed value and the battery starts to charge with a constant current mode. As the battery voltage increases, it switches to a constant voltage mode where the battery current decreases as the voltage approaches the maximum rated charging voltage of the battery or the battery enters a full state.

The BQ24705RGERG4 also features dual-fuse and dual-thermal protection for added safety and protection in case of over current or over-temperature situations. It also features analog and digital monitoring signals such as Charge Status, Charge Status Interrupt, Charge End, Charge Current and Battery Voltage.

The BQ24705RGERG4 is a highly efficient and reliable battery charger IC capable of charging a wide range of battery chemistries. It offers 3-stage charge control and various protection features, making it suitable for portable consumer electronic, automotive and IoT applications.

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