PFE30028/T

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AC/DC converters play an important role in the modern world. In the AC/DC converters family, PFE30028/T (referred to as PFE30028 hereinafter) is a core switching power device. It works in a range of voltages and features a low power consumption, light weight, and compact size, making it a popular choice for various applications.

PFE30028\'s chief application field is buck-type DC/DC converter, the most popular and universal type of DC/DC converters , which converts a higher DC voltage to a lower DC voltage. The output voltage can be programmable by programming the switch duty cycle. PFE30028 is applicable to an input voltage range from 5 V to 38 V. Dual-inductors or even single-inductor buck topologies, as well as circuit architectures with an input-boost inductor, are all possible circuits for designing DC/DC converters with PFE30028.

The unique feature of PFE30028 power switches is the PWM-enhanced-MOSFET (E-MOSFET) circuit which eliminates the need for charge pump and drivers. This single switch structure simplifies the system architecture significantly, thus greatly reducing the power consumption. Additionally, PFE30028 has few external components and built-in current limit protection, making it very reliable and efficient.

The operating principle of this PFE30028 based buck converters is mainly based on the PWM-controlled switch M after the synchronous rectifier. On one side, the M switch dynamic on-resistance is reduced with the help of the Drive signal. On the other side, it is limited by the current limit. Moreover, the duty ratio of the PWM signal can be used as the output voltage control.

When the power device of the PFE30028 is turned on, the output side of the M switch is also on and the total current is limited by the current limit resistor. When the power device of PFE30028 is turned off, the synchronous rectifier will be on and the remaining energy stored in the output inductor will be delivered to the load per cycle of PWM, which reduces the voltage ripple. Meanwhile, the equalization capacitor connected to the output side will provide a stable voltage.

Compared to other traditional buck DC/DC converters, PFE30028 offers improved efficiency due to its low dynamic on-resistance, low power consumption, low latency time and inherent protection functions. Its lightweight and low profile makes PFE30028 ideal for handheld electronic products and embedded systems, such as mobile phones, tablets, wearable devices, industrial and automotive applications.

In conclusion, PFE30028 with its highly efficient, low power consumption and reliable working mechanism is an optimal and cost-effective choice for DC/DC converters. It is a powerful tool for designers who wish to deploy buck-type DC/DC converters.

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