BAS28-7

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Diodes - Rectifiers - Arrays - BAS28-7 Application Field and Working Principle

The BAS28-7, manufactured by NXP Semiconductors, is an array package consist of 7 Schottky barrier diodes. It is widely used in the field of rectification and it features low forward voltage drop and fast recovery time. This makes it highly suitable for applications that require high efficiency power supply designs. In this article we will discuss the application field and working principle of the BAS28-7.

Application Field

The BAS28-7 is mainly used for RFI (radio frequency interference) and EMI (electromagnetic interference) mitigation in power supply applications, as it is a low power loss rectifier. In addition, the BAS28-7 can be used in high-speed semiconductor switching applications, such as DC-DC converters, or any application that requires low-level rectification.

Working Principle

The BAS28-7 semiconductor package consists of 7 individual Schottky barrier diodes. Each diode is formed using a metal-semiconductor junction. This allows the diode to have a low forward voltage. When a voltage is applied across a Schottky barrier diode, holes in the semiconductor will be repelled by the negative side of the voltage and will move to the positive side, forming a “diode-bridge”, which is a type of semiconductor rectifier. This rectifier will block current from travelling in the opposite direction, and it will allow current to flow in the forward direction, thus allowing for the rectification of voltage.

The BAS28-7 is also characterized by its fast recovery time (trr), which makes it suitable for high-speed switching applications. Trr is mainly affected by the size of the junction and by the doping of the p-n junction. The faster a diode is able to recover its forward voltage drop, the faster it is able to open the rectifier bridge, thus allowing the current to switch directions quickly. The BAS28-7 offers good switching speeds, making it desirable in high speed circuit designs.

Conclusion

The BAS28-7 package is widely used in applications requiring fast and efficient rectification, such as high speed switching and power supply applications. It diminishes unwanted RFI and EMI interference, while also taking advantage of its low power loss. It is an ideal choice for any application that necessitates lower switching losses and faster switching speeds.

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