BQ24157SYFFT

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PMIC (Power Management Integrated Circuits) are crucial components of electronic systems, providing power and managing energy distribution, especially in battery-powered devices or systems. In particular, battery chargers perform the essential task of providing, storing and managing the flow of electricity to a rechargeable device. The BQ24157SYFFT is an integrated circuit designed for precisely this purpose. This datasheet provides an overview of the device, including its application field, hardware features and working principle.

The BQ24157SYFFT is a high-performance integrated circuit for charging Li-Ion and Li-Polymer batteries. It includes circuitry needed to accurately and safely control the charging cycle of a battery, such as charge current and termination, as well as providing protection from overheating and other conditions, making it a suitable choice for a variety of applications. It is designed to be used in combination with a USB port and is compatible with USB 1.1, USB 2.0, USB 3.0 and USB Type-C.

The hardware features of the BQ24157SYFFT include a highly integrated charge management solution, combined with an efficient charge cycle termination algorithm. This results in a current consumption of less than 4µA when charging is complete and no further management is needed. Additionally, the integrated cycle-by-cycle current limiting algorithm maximizes cell life while preventing excessive heat generation.

The device operates by controlling a buck or boost topology synchronous buck-boost converter. Its internal clock frequency is 20MHz and its operating temperature range is -20°C to 85°C. It is rated for an input voltage of 2.5V to 10V and an output voltage of 4V to 14V. It is rated for an input current of 2A and an output current of 6A. The device is programmable from an external I2C Interface to configure the charge voltage, charge current, and charge cycle duration.

The BQ24157SYFFT is ideal for battery-powered portable applications, including tablets, smart phones, digital cameras, handheld gaming devices, and portable media players. It provides accuracy and features that make it suitable for a variety of complex applications that require power management solutions. The device offers enhanced features and system level protection, including a Charge Termination Fuse (CTF) to reduce component count and help protect the system from overcharging the battery. Furthermore, it offers thermal monitoring of the chip, device and cell to ensure safe operating temperatures.

In summary, the BQ24157SYFFT is an integrated circuit offering a variety of features that make it an ideal choice for charging Li-Ion and Li-Polymer batteries. Its efficient charge cycle termination algorithm, integrated cycle-by-cycle current limiting algorithm, programmable voltage, current and duration, as well as its thermal protection capabilities, make it a suitable choice for a variety of applications. The device provides a low overall power consumption, appropriate cycling performance, system level protection and enhanced thermal monitoring, thus making it an ideal choice for battery-powered applications.

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