BQ24250YFFR

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PMIC, also known as power management integrated circuit, is a type of semiconductor that contains multiple voltage regulating circuits. It is used for voltage regulation and power management of devices in different applications. One type of PMIC is a battery charger, which is used to charge and maintain battery cells by controlling the charging current and voltage. The BQ24250YFFR is a battery charger PMIC that can be used in mobile devices and other devices for charging, power management, and protection. In this article, we will discuss the application field and working principle of the BQ24250YFFR.

Application Field of BQ24250YFFR
The BQ24250YFFR supports a wide range of applications such as cell phones, tablets, cameras, and automotive applications. It is suitable for charging Li-ion, LiFeP04, NiMH and NiCD batteries. The BQ24250YFFR includes protection features like over current protection, over voltage protection, thermal shutdown and battery over voltage protection that find applications in many different mobile and portable applications.

Working Principle of BQ24250YFFR
The BQ24250YFFR is a switched mode charger PMIC that performs the functions of regulation and derating. It works on the principle of constant voltage and current regulation where the output from the charger is continuously regulated to ensure a stable charge current and constant battery voltage regardless of input voltage variations. The BQ24250YFFR uses a voltage-mode switch controller to generate the current through the inductor, and a voltage regulation feedback circuit to maintain constant voltage across the output. The device also supports autonomous power save mode and enables control over charging cycle count and temperature control.

The device also includes special features like input under and over voltage detection and protection, preconditioning, charging qualification and autonomous power save mode. The input under voltage is set to 4.45V and over voltage to 7V with a typical charging current of 1A and a maximum charging current of 2A. The BQ24250YFFR includes an Adaptive Charge, giving the user the ability to adjust the charge current on the fly without external components. The device also supports fast charging and discharging modes, making it suitable for fast charging applications.

Conclusion
The BQ24250YFFR is a battery charger PMIC that supports a wide range of applications such as cell phones, tablets, cameras, and automotive applications. It has many features that make it suitable for use in mobile and portable applications, including over current protection, over voltage protection, thermal shutdown, input under and over voltage detection and protection, preconditioning, charging qualification and autonomous power save mode. The device uses a voltage-mode switch controller to generate the current through the inductor, and a voltage regulation feedback circuit to maintain constant voltage across the output. It also provides the user with the ability to adjust the charge current on the fly without external components. The BQ24250YFFR is an ideal choice for fast charging applications.

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