BD9325FJ-E2

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BD9325FJ-E2 Application Field and Working Principle

BD9325FJ-E2 is a power management integrated circuit (PMIC) that is generally used to regulate the voltage of the circuits. Specifically, it belongs to the voltage regulators (VRs) family and more specifically to the DC DC switching regulators category. The BD9325FJ-E2 is extremely efficient and can support up to two power supplies with two independent output voltages.

Application Fields

The BD9325FJ-E2 is ideal for powering mobile phones, smartphones and tablet PCs. It can also be used in cars and other low-energy applications. For auto applications, this PMIC can supply two different voltages to the car’s battery, depending on the speed of the vehicle. Furthermore, it is a great choice for applications such as small portable devices.

Working Principle

The fundamental operation of this PMIC is based on the switching regulator principle. The switching regulator works on the basis that an inductor is placed in series with the external power supply and a power switch is connected across the inductor. The external power supply supplies the energy necessary for the inductor to generate a magnetic field. The power switch is then opened and closed so that the current alternates between flowing out of the inductor and back into it. The goal of this is to provide regulation on the voltage of the load. With the BD9325FJ-E2, two different output voltages can be regulated at the same time and the switching frequency is adjustable.

Power Management Features

The BD9325FJ-E2 includes several power management features that make it even more efficient and reliable. For example, the device features over-current and over-voltage protection, and it also includes thermal shutdown and cycle-by-cycle current limit. Furthermore, there is an external PGOOD pin for monitoring of output voltages and the ENABLE pin for power up and down power sequencing.

Conclusion

The BD9325FJ-E2 belongs to the PMIC family, more specifically to the voltage regulator category and even more specifically to the DC DC switching regulator family. It is a highly efficient device and it is mainly used to power up mobile phones, tablets and other portable devices. The device works based on the switching regulator principle and it also includes several power management features such as over-current and over-voltage protection, thermal shutdown and cycle-by-cycle current limit, among others.

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