600V super junction MOSFETs are design with fastest trr
Fast reverse recovery time (trr) is one of the characteristics of the R60xxRNx series which Rohm Semiconductor has added to its PrestMOS range of 600V super junction MOSFETs. They also contribute to low power loss and noise suppression characteristics, said the company.
They are optimised for driving small motors in refrigerators, ventilation fans, and other applications where noise suppression is important. While high efficiency MOSFETs are increasingly used in motor inverter circuits, they are noisy and typically involve adding components and/or changing circuit patterns, explained Rohm.
To meet these needs, Rohm introduced the PrestoMOS Super Junction MOSFETs in 2012. They achieved high marks for achieving lower power consumption. The three new models in the R60xxRNx series maintains the high-speed trr characteristics while minimising noise. An industry-best trr of 40ns is achieved by improving conventional lifetime control technology, reducing switching losses by approximately 30 per cent over general products that translates to lower application power loss, said Rohm. At the same time, the super junction structure reduces noise characteristics (which are inversely related to faster trr) by about 15dB compared to standard products (under Rohm measurement conditions at 40MHz), reducing the number of parts required for noise countermeasures.
PrestoMOS power MOSFETs maintain the high withstand voltage and low on resistance of super junction MOSFETs while speeding up the trr of the built-in diode. The reduced switching losses make the MOSFETs suitable for applications with inverter circuits, such as air conditioners, ventilation fans, fan motors and refrigerators.
