ROHM has released new N-channel MOSFETs - RF9x120BKFRA / RQ3xxx0BxFRA / RD3x0xxBKHRB - featuring low ON-resistance ideal for a variety of automotive applications, including motors for doors and seat positioning, as well as LED headlights. Sales have begun with 10 models across 3 package types, with plans to expand the lineup in the future.

The automotive sector is seeing a surge in electronic components, driven by the demand for enhanced safety and convenience. At the same time, there is a pressing need for improved power efficiency to optimize fuel and electricity consumption. Especially for MOSFETs essential for switching applications in automotive systems, there is a growing requirement for lower ON resistance to minimize loss and heat generation.

ROHM, which has been supplying low ON-resistance MOSFETs for consumer and industrial equipment, has now extended this technology to the automotive sector. Adapting cutting-edge medium voltage processes to meet the stringent reliability requirements of automotive products allowed us to develop 10 N-channel MOSFET models characterized by low ON resistance.

Offered in voltage ratings of 40 V, 60 V, and 100 V, the new products incorporate a split-gate structure to achieve low ON-resistance, contributing to higher efficiency operation in automotive applications. All models are qualified under the AEC-Q101 automotive reliability standard, guaranteeing exceptional high reliability.

Users can select from among three package types, depending on the application. For space-constrained sets like Advanced Driver Assistance Systems (ADAS), the compact DFN2020Y7LSAA (2.0 mm x 2.0 mm) and HSMT8AG (3.3 mm x 3.3 mm) packages are ideal. The widely used TO-252 (DPAK) package (6.6 mm x 10.0 mm) is also available for automotive power applications. In addition, ROHM has further enhanced mounting reliability by utilizing wettable flank technology for the DFN2020Y7LSAA package and gull-wing leads for the TO-252 package.

ROHM plans to expand its lineup of medium-voltage N-channel MOSFETs to provide even greater miniaturization and higher efficiency in automotive applications. Mass production of the DFN3333 (3.3 mm x 3.3 mm) and HPLF5060 (5.0 mm x 6.0 mm) packages is scheduled for October 2024, followed by 80V products in 2025. P-channel products are also scheduled for future release.

Key applications

• Vehicle motors (e.g., doors, seat positioning, power windows)
• LED headlights
• Car infotainment/displays
• Advanced Driver Assistance Systems (ADAS)