Infineon launches OptiMOS 7 technology for 40V automotive MOSFET product family-EEWORLD

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Infineon OptiMOS 7 is the fifth generation trench technology developed by Infineon and is the leading dual polysilicon trench technology today. The use of leadless packaging combined with copper clip technology has greatly improved the current capability of the product . This series of products will be mass-produced using the industry's advanced 300mm thin wafer technology.

Overview of OptiMOS 7 40V Automotive MOSFET

The 40V automotive MOSFET product series using OptiMOS 7 technology further improves the specific on-resistance and reduces RDSON*A, that is, achieving lower RDSON under the same wafer area, or achieving the same RDSON under a smaller wafer area. As shown in the figure below, the evolution of the specific on-resistance of Infineon's 40V MOSFET products of different generations.

Infineon 40V MOSFET Specific On-Resistance Generational Evolution

Infineon OptiMOS 7 technology is the fifth generation of trench technology developed by Infineon, and is the leading dual polysilicon trench technology today. The use of leadless packaging combined with copper clip technology has greatly improved the current capability of the product. This series of products will be mass-produced using the industry's advanced 300mm thin wafer technology. Infineon's unique wafer surface metallization coating treatment makes this series of products not only have excellent electrical performance, but also have good thermal conductivity, helping users to achieve compact and high-efficiency design solutions. Through continuous technological innovation and strong and robust packaging, Infineon helps electronic design engineers to easily use our advanced performance, cost-effective, strong and durable MOSFET products to achieve and meet various automotive electronic controller application design requirements, such as electric power steering systems, brake systems, battery disconnect switches, new regional architectures, DC -DC and BLDC drivers , etc. The following table can help users combine actual applications as a reference for selecting suitable packaging products.

Automotive Application Package Selection Guide

OptiMOS 7 40V automotive MOSFET parameter performance improvement

Compared with previous generations of trench technology products, OptiMOS 7 products have further improved avalanche tolerance, current capability, switching speed, safe operating area (SOA), etc. The following table lists the comparison of several important performance parameters of OptiMOS 7 products and previous generations of trench technology products (based on the same/similar wafer area). It can be seen that this series of products not only has the smallest RDSON product, but also has the highest avalanche tolerance. Thanks to the improvement of production process control and technology, the VGS(th) distribution has also been greatly narrowed.

Comparison of important parameters of different generations of MOSFET

Avalanche current capability

Even with the same RDSON, the OptiMOS 7 product has achieved the highest avalanche current capability, as shown in the figure below. As shown in the table above, the narrowed VGS(th) distribution range is also conducive to the parallel use of devices. Therefore, this series of products is very suitable for applications such as safety switches and power distribution.

Avalanche current

Safe Operating Area (SOA)

Compared to the OptiMOS 6 product series, the SOA of the OptiMOS 7 products has been expanded by an average of 25%.

SOA curve

Gate charge Qg

The following table gives the parameters of Qg, Qgd and other parameters of different generations of products; the figure below shows the simulation waveforms of the device switching transients. It can be seen that compared with the previous generations of trench technology with the same/similar RDSON products, the OptiMOS 7 products have the smallest gate charging charge, reducing gate charging consumption; at the same time, the switching speed is improved, the switching loss is reduced, the dead time is shortened, and it can work at a higher switching frequency, thereby further improving the system power conversion efficiency and power density. Therefore, this series of products is very suitable for power converters and motor drives in high-frequency switching applications.

Switching transient process simulation waveform

OptiMOS 7 automotive MOSFET naming convention

Based on market feedback and analysis of competitors, we have readjusted the naming rules for the new generation of OptiMOS 7 automotive MOS. For example, the information represented by each character of Infineon's part number IAUCN08S7N055X is shown in the figure below. Compared with the previous naming rules, the biggest change is the removal of the maximum continuous current IDSmax to avoid unnecessary misunderstandings when users select devices. At the same time, in order to let users fully understand the definition of the current capability of the device, we provide detailed information in the data sheet.