MBRF30045

Diodes - Rectifiers - Arrays: MBRF30045 Application Field and Working Principle

The MBRF30045 from Infineon Technologies is a dual ultrafast low-voltage avalanche rectifier in a package designed for high-performance rectification with low forward voltage drop and high forward current rating. This device belongs to the category of rectified diodes, which are ultra-fast body diodes specially designed to reduce the pre-reverse recovery losses of rectification and are used to decrease the amount of thermal dissipation when high power loads are switched. MBRF30045 is the marketplace\'s first 400 V avalanche rugged technology rectifiers offering all the features of an ultra-fast, ultra-rugged and low-dropout diode together with avalanche ruggedness in a miniature single in line 4-pin package, making it a viable choice for cost-sensitive power applications.
MBRF30045s are mainly used for generation and storage of energy, as well as for power conversion applications like power factor correction, power supplies and motor drives. The main purpose of the device is to change AC to DC, exactly like all rectifled diodes, yet its combination of properties makes it more reliable, efficient and small in size.
Under extreme conditions, the device is provided with avalanche ruggedness and ultra-low forward voltage drop. It can withstand high surge current and high temperature, flexible reverse voltage and over-voltage conditions, reverse recovery characteristics and low EMI, high reliability, and a 60 V snap-off voltage over its rated current.

Working Principle

The MBRF30045 is based on an ultra-fast body diode, with a special feature of a reverse-recovery process and low reverse saturation current. The ultrafast body diodes are designed to drastically reduce pre-reverse recovery losses, thus decreasing the amount of thermal dissipation when a high power load is switched. The two elements that jointly give the device its ultra-fast recovery process are the reverse-biased diode state and the forward-biased diode state – the state of a diode which is reversed with respect to its forward voltage drop. Reverse recovery times in the MBRF30045 can be as low as 9 ns, which is better than other rectifiers. With the significant improvement of the reverse recovery process, the device can achieve over 90% of power savings in microprocessor load conditions (which otherwise, with a slower recovery profile, would include a significant amount of energy dissipation).
Another key feature of the MBRF30045 is its high forward voltage drop. When compared with other rectifier, MM30045 has a much lower forward voltage drop when operating at higher currents, which leads to efficiency gains for power conversion, supply and motor drive applications. Moreover, it will reduce the power supply voltage drop and increase the efficiency of the system. Due to its low voltage drop, MBRF30045 is often used in more sensitive electronics like computers, microcontrollers and power supplies.

Benefits

The MBRF30045 integrates many valuable benefits that contribute to its success. Its low forward voltage drop allows higher efficiency of power conversion and motor drive applications as well as preserving the power supply voltage. The fast recovery of the ultra-fast body diodes, reduces the power loss by over 90%, and its wide temperature range and reverse voltage makes it a reliable and long life-span device. Its low EMI leads to quiet and non-disturbing operation and electric compliance with standards. In addition, the package includes a high surge current design and a 60 V snap-off voltage over its rated current.

Conclusion

In conclusion, the MBRF30045 is a specialized rectifier with many features that make it a viable choice in many power conversion, storage and generation applications. Its low forward voltage drop, fast recovery,high surge current design and 60 V snap-off voltage ensure a more reliable and efficient power supply, while its wide temperature range and reverse voltage provide a reliable and long life-span device. The device\'s low EMI also leads to quieter and electric compliance with standards, making it a viable choice for many critical systems.