BQ25898DYFFT Integrated Circuits (ICs)

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The BQ25898DYFFT is a highly versatile and powerful battery charger for a variety of battery types, including Li-ion, Li-polymer and NiMH. It is designed to charge and maintain cells in the range of 4.2V to 8.4V. Key features of the BQ25898DYFFT include an improved efficiency of trading in both cut-off and charging modes, a wide input voltage range, an adjustable charging voltage and current, and a battery temperature monitor with an adjustable high and low temperature cutoff.

Application Field

Due to its versatility, the BQ25898DYFFT can be used for a large range of applications, such as battery powered smartphones and tablets, wearables and IoT devices. In addition, it is also suitable for applications such as solar power systems, medical instruments and robotics.

Working Principle

The BQ25898DYFFT uses a constant-voltage (CV) / constant-current (CC) mode to charge a battery. When the input voltage is greater than the set charging voltage, the charger will enter the CC mode and provide a constant output current. As the battery voltage rises and approaches the set voltage, the charger will switch to CV mode and reduce current to maintain the set voltage. When the battery is full, the charger will switch to cut-off mode and stop the battery charging.

Protection Features

The BQ25898DYFFT is also equipped with a range of protection features including thermal foldback (TFL), over-charge protection (OCP) and over-voltage protection (OVP). In addition, the device also includes a timer to ensure the battery does not remain on charge for too long.

Conclusion

The BQ25898DYFFT is a highly versatile and powerful battery charger suitable for a variety of battery types and applications. With its wide input voltage range, adjustable charging voltage and current, and a range of protection features, it provides a robust and reliable solution for any battery charging system.

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