ROHM’s New N-channel MOSFETs Offer High Mounting Reliability in Automotive Applications

Release time：2024-09-24
author：AMEYA360
source：ROHM
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　　ROHM has released 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.

ROHM’s New N-channel MOSFETs Offer High Mounting Reliability in Automotive Applications

　　The automotive sector is seeing a surge in the number of 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 40V, 60V, and 100V, 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 (2.0mm × 2.0mm) and HSMT8AG (3.3mm × 3.3mm) packages are ideal. For automotive power applications, the widely used TO-252 (DPAK) package (6.6mm × 10.0mm) is also available. 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.

　　Going forward, 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 (3.3mm × 3.3mm) and HPLF5060 (5.0mm × 6.0mm) packages is scheduled for October 2024, followed by 80V products in 2025. P-channel products are also scheduled for future release.

　　Application Examples◇ Vehicle motors (e.g., doors, seat positioning, power windows)

　　◇ LED headlights

　　◇ Car infotainment / displays

　　◇ Advanced Driver Assistance Systems (ADAS)

　　Internet Sales InformationOnline Distributors: DigiKey, Mouser and Farnell

　　Pricing: $3.50/unit (samples, excluding tax)

　　Availability: Now (OEM quantities)

　　The products will be offered at other online distributors as they become available.

　　(Sales Launch Date: June 2024)

　　Online Distributors

　　TerminologyON resistance (Ron)

　　The resistance value between the Drain and Source while the MOSFET is ON. The smaller this value is, the lower the (power) loss during conduction.

　　N-channel MOSFET

　　A type of MOSFET that conducts when a positive voltage is applied to the Gate relative to the Source. N-channel MOSFETs are more widely adopted in the market today due to their lower ON-resistance (RDS(on)) over P-channel variants, facilitating use in a broad range of circuits.

　　Split Gate Structure

　　A technology that divides the gate of the MOSFET into multiple parts to efficiently regulate the flow of electrons. This ensures fast, reliable operation.

　　Wettable Flank Technology

　　A technique for plating the sides of the lead frame on bottom electrode packages to improve mounting reliability.

　　Gull Wing Leads

　　A terminal structure that spreads outwards from both sides of the package. It achieves excellent heat dissipation along with increased mounting reliability.

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ROHM Develops an Ultra-Compact MOSFET Featuring Industry-Leading* Low ON-Resistance Ideal for Fast Charging Applications
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ROHM Develops an Ultra-Compact MOSFET Featuring Industry-Leading* Low ON-Resistance Ideal for Fast Charging Applications

　　ROHM has developed a 30V N-channel MOSFET — AW2K21 — in a common-source configuration that achieves an industry-leading ON-resistance of 2.0mΩ (typ.) in a compact 2.0mm × 2.0mm package.　　With the rise of compact devices featuring large-capacity batteries, such as smartphones, the need for fast charging functionality to shorten charging times continues to grow. These applications require bidirectional protection to prevent reverse current flow to peripheral ICs and other components when not actively supplying or receiving power. What’s more, fast charging involves high current power transfer, leading smartphone manufacturers to demand stringent specifications for MOSFETs, including a maximum current rating of 20A, breakdown voltage between 28V and 30V, and an ON-resistance of 5mΩ or less. However, meeting these requirements with standard solutions typically necessitates the use of two large low ON-resistance MOSFETs, increasing board space along with mounting complexity.　　In response, ROHM developed an ultra-compact low ON-resistance MOSFET optimized for fast high-power charging. The AW2K21 adopts a proprietary structure that enhances cell density while minimizing the ON-resistance per unit chip area. Two MOSFETs are integrated into a single package, allowing a single part to support bidirectional protection applications (commonly required in power supply and charging circuits).　　The proprietary structure also places the drain terminal on the top surface, unlike on the backside in standard vertical trench MOS structures. This enables the use of a WLCSP, which achieves a larger chip-to-package area ratio that further reduces ON-resistance per unit area. As a result, the new product not only minimizes power loss but also supports high current operation, making it ideal for high-power fast charging applications despite its ultra-compact size.　　For example, in power supply and charging circuits for compact devices, standard solutions typically require two 3.3mm × 3.3mm MOSFETs. In contrast, the AW2K21 can achieve the same functionality with a single 2.0mm × 2.0mm unit, reducing the footprint and ON-resistance by approximately 81% and 33%, respectively. Even compared to similarly sized GaN HEMTs, ON-resistance is decreased by up to 50%, contributing to lower power consumption and increased space savings across a variety of applications.　　The AW2K21 is also suitable for use as a unidirectional protection MOSFET in load switch applications, where it maintains the industry’s lowest ON-resistance. At the same time, ROHM is further pushing the limits of miniaturization with the development of an even smaller 1.2mm × 1.2mm model.　　Going forward, ROHM remains dedicated to supporting the miniaturization and energy efficiency of electronic systems through compact, high-performance solutions that contribute to the realization of a sustainable society.　　Key Product Characteristics　　Application Examples　　• Smartphones　　• VR (Virtual Reality) headsets　　• Compact printers　　• Tablets　　　　 • Wearables　　　　　　　　　　 • LCD monitors　　• Laptops　　　　 • Portable gaming consoles　　　 • Drones　　And other applications equipped with fast charging capability.　　Terminology　　MOSFET (Metal Oxide Semiconductor Field Effect Transistor)　　A field-effect transistor (FET) featuring a metal oxide semiconductor structure (the most commonly used type). It consists of three terminals: gate, drain, and source. Applying a voltage to the gate (control terminal) regulates current flow from the drain to the source.　　N-channel MOSFETs turn ON when a positive voltage is applied to the gate relative to the source. A common-source configuration MOSFET integrates two transistor elements that share a single source terminal.　　ON-Resistance　　The resistance between the Drain and Source of a MOSFET when it is in the ON state. A smaller RDS(on) reduces power loss during operation.　　Breakdown Voltage　　The maximum voltage that can be applied between the drain and source terminals of a MOSFET without causing damage. Exceeding this limit results in dielectric breakdown, potentially leading to device failure or malfunction.　　WLCSP (Wafer Level Chip Scale Package)　　An ultra-compact package in which terminals and wiring are formed directly on the wafer before separated into individual chips. Unlike general packages where the chips are cut from the wafer and then molded with resin to form terminals, WLCSP allows the package size to match the chip itself, making it possible to further reduce size.　　GaN HEMT　　GaN (Gallium Nitride) is a compound semiconductor material used in next-generation power devices. It offers superior physical properties over conventional silicon, enabling higher frequency operation with faster switching speeds. HEMT stands for High Electron Mobility Transistor.
2025-07-08 17:04 reading：208
ROHM Introduces a New MOSFET for AI Servers with Industry-Leading* SOA Performance and Low ON-Resistance
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ROHM Introduces a New MOSFET for AI Servers with Industry-Leading* SOA Performance and Low ON-Resistance

　　ROHM has released of a 100V power MOSFET - RY7P250BM - optimized for hot-swap circuits in 48V power systems used in AI servers and industrial power supplies requiring battery protection to the market.　　As AI technology rapidly advances, data centers are facing unprecedented processing demands and server power consumption continues to increase annually. In particular, the growing use of generative AI and high-performance GPUs has created a need to simultaneously improve power efficiency while supporting higher currents. To address these challenges, the industry is shifting from 12V systems to more efficient 48V power architectures. Furthermore, in hot-swap circuits used to safely replace modules while servers remain powered on, MOSFETs are required that offer both wide SOA (Safe Operating Area) and low ON-resistance to protect against inrush current and overloads.　　The RY7P250BM delivers these critical characteristics in a compact 8080-size package, helping to reduce power loss and cooling requirements in data centers while improving overall server reliability and energy efficiency. As the demand for 8080-size MOSFETs grows, this new product provides a drop-in replacement for existing designs. Notably, the RY7P250BM achieves wide SOA (VDS=48V, Pw=1ms/10ms) ideal for hot-swap operation. Power loss and heat generation are also minimized with an industry-leading low ON-resistance of 1.86mΩ (VGS=10V, ID=50A, Tj=25°C), approximately 18% lower than the typical 2.28mΩ of existing wide SOA 100V MOSFETs in the same size.　　Wide SOA tolerance is essential in hot-swap circuits, especially those in AI servers that experience large inrush currents. The RY7P250BM meets this demand, achieving 16A at 10ms and 50A at 1ms, enabling support for high-load conditions conventional MOSFETs struggle to handle.　　ROHM’s new product has also been certified as a recommended component by leading global cloud platform provider, where it is expected to gain widespread adoption in next-generation AI servers. Especially in server applications where reliability and energy efficiency are mission-critical, the combination of wide SOA and low RDS(on) has been highly evaluated for cloud infrastructure.　　Going forward, ROHM will continue to expand its lineup of 48V-compatible power solutions for servers and industrial equipment, contributing to the development of sustainable ICT infrastructure and greater energy savings through high-efficiency, high-reliability products.　　Application Examples　　• 48V AI server systems and power supply hot-swap circuits in data centers　　• 48V industrial equipment power systems (i.e. forklifts, power tools, robots, fan motors)　　• Battery-powered industrial equipment such as AGVs (Automated Guided Vehicles)　　• UPS and emergency power systems (battery backup units)　　Online Sales InformationSales Launch Date: May 2025　　Pricing: $5.50/unit (samples, excluding tax)　　Online Distributors: DigiKey™, Mouser™ and Farnell™　　The products will be offered at other online distributors as they become available.　　Applicable Part No: RY7P250BM　　EcoMOS™ BrandEcoMOS™ is ROHM's brand of silicon MOSFETs designed for energy-efficient applications in the power device sector.　　Widely utilized in applications such as home appliances, industrial equipment, and automotive systems, EcoMOS™ provides a diverse lineup that enables product selection based on key parameters such as noise performance and switching characteristics to meet specific requirements.　　TerminologyHot-Swap Circuit　　A circuit that enables components to be inserted or removed while the system remains powered on.　　It typically consists of MOSFETs, protection elements, and connectors, and is responsible for suppressing inrush current and protecting against overcurrent conditions, ensuring stable operation of the system and connected components.　　Power MOSFET　　A MOSFET designed for power conversion and switching applications. N-channel MOSFETs are the dominant type, turning on when a positive voltage is applied to the gate relative to the source. They offer lower ON-resistance and higher efficiency than P-channel variants. Due to their low conduction loss and high-speed switching performance, power MOSFETs are commonly used in power supplies, motor drives, and inverter circuits.　　SOA (Safe Operating Area)　　The defined range of voltage and current in which a device can operate reliably without risk of failure. Operating outside this boundary may result in thermal runaway or permanent damage. SOA is especially critical in applications exposed to inrush currents or overcurrent conditions.　　Low ON-resistance (RDS(on))　　The resistance value between the Drain and Source of a MOSFET during operation. A smaller RDS(on) reduces power loss during operation.　　Inrush Current　　A sudden surge of current that momentarily exceeds the rated value when an electronic device is powered on. Proper control of this current reduces stress on power circuit components, helping to prevent device damage and stabilize the system.
2025-07-03 14:52 reading：217
ROHM's SiC MOSFET Adopted for Mass Production in Toyota's New BEV
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ROHM's SiC MOSFET Adopted for Mass Production in Toyota's New BEV "bZ5" for the Chinese Market

　　~Integration in traction inverters extends the cruising range and improves performance~　　The power module equipped with ROHM Co., Ltd.'s 4th generation SiC MOSFET bare chip has been adopted in the traction inverter of Toyota Motor Corporation's (hereinafter "Toyota") new crossover BEV "bZ5" for the Chinese market.　　The "bZ5" is a crossover-type BEV jointly developed by Toyota, BYD TOYOTA EV TECHNOLOGY Co., Ltd. (hereinafter "BTET"), FAW Toyota Motor Co., Ltd. (hereinafter "FAW Toyota"), etc., and was launched by FAW Toyota in June 2025.　　The power module adopted this time has started mass production shipments from HAIMOSIC (SHANGHAI) Co., Ltd., a joint venture between ROHM and Zhenghai Group. ROHM's power solutions centered on SiC MOSFETs contribute to the extended range and enhanced performance of the new BEV.　　ROHM aims to complete the construction of the production line for the next-generation 5th generation SiC MOSFET by 2025, and is also accelerating the market introduction plans for the 6th and 7th generations, focusing on the development of SiC power devices. ROHM will continue to work on improving device performance and production efficiency, and strengthen the system to provide SiC in various forms such as bare chips, discrete components, and modules, promoting the spread of SiC and contributing to the creation of a sustainable mobility society.　　About the "bZ5"　　The "bZ5" is a crossover BEV jointly developed by Toyota, BTET, FAW Toyota, etc., with the concept of "Reboot." It features active and iconic styling and is designed to provide a personal space for young users known as Generation Z. The driving range is 550 km for the lower grade and 630 km (CLTC mode) for the higher grade. Reservations began on April 22, 2025, the day before the opening of the 2025 Shanghai Motor Show, attracting significant attention.　　About HAIMOSIC (SHANGHAI) Co., Ltd.　　HAIMOSIC (SHANGHAI) CO.,LTD. is a Joint venture initiated by Zhenghai Group Co., Ltd. (China) and ROHM Co., Ltd. (Japan). HAIMOSIC is mainly engaged in the R&D, design, manufacturing and sales of the silicon carbide power module, with an estimated annual capacity of 360,000 pieces/year. The total investment of the project is 450 million RMB and the registered capital is 250 million RMB. For more details, please visit HAIMOSIC's website: http://www.haimosic.com/
2025-06-23 14:11 reading：302
New High Accuracy Current Sense Amps Compatible with Both Negative and High Voltages
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New High Accuracy Current Sense Amps Compatible with Both Negative and High Voltages

　　ROHM has developed a new lineup of high accuracy current sense amps – the BD1423xFVJ-C and the BD1422xG-C. They are qualified under the AEC-Q100 automotive reliability standard. The BD1423xFVJ-C series, offered in the TSSOP-B8J package, supports input voltages up to +80V, making it ideal for high-voltage environments such as 48V DC-DC converters, redundant power supplies, auxiliary batteries, and electric compressors. The series includes three models with different gain settings: BD14230FVJ-C, BD14231FVJ-C and BD14232FVJ-C.　　For lower voltage use cases, the BD1422xG-C, available in the compact SSOP6 package, supports input voltages up to +40V. This makes them suitable for automotive applications requiring space-saving designs, such as current monitoring and protection (overcurrent) in 5V/12V power supply networks used in body and drivetrain domains. Like its high-voltage counterpart, this series also consists of three different gain options: BD14220G-C, BD14221G-C and BD14222G-C.　　In recent years, alongside conventional 5V/12V power supplies, the automotive market has seen a growing adoption of 48V systems fueled by the rising popularity of electric vehicles. Furthermore, as vehicle functionality becomes more advanced, the need for precise monitoring and control across a wide range of applications continues to increase, placing a greater importance on high-accuracy current sensing.　　A current sense amp indirectly measures the current flowing through a circuit by amplifying the miniscule voltage drop across a shunt resistor. The amplified signal is then sent to an ADC or comparator for system control and monitoring. ROHM’s automotive-grade current sense amps meet market demands by leveraging proven analog expertise. This enables high-accuracy current sensing with compatibility for both negative and high voltage environments, contributing to improved safety and reliability in automotive applications, particularly electric vehicles.　　These new products achieve greater space efficiency by integrating most of current sensing circuitry, typically comprised of an operational amplifier and discrete components, int o a single package. As a result, current detection is possible by simply connecting a shunt resistor. The devices also feature a two-stage amplifier configuration, consisting of a chopper amplifier at the input and an auto-zero amplifier at the output. Internal resistor matching for gain setting ensures stable, accurate current sensing (±1%) while minimizing the effects of temperature variations.　　Furthermore, current detection accuracy is maintained even when an external RC filter circuit added for noise suppression, significantly reducing design complexity and development time. Additional features include -14V negative voltage tolerance that supports back electromotive force, reverse connection, and negative voltage input.　　Going forward, ROHM will continue to deliver optimal solutions that contribute to higher precision and enhanced reliability in automotive equipment.　　Application Examples　　• BD1423xFVJ-C (for 48V systems): Redundant power supplies, auxiliary batteries, DC-DC converters, and electric compressors, and the like　　• BD1422xG-C (for 5V/12V systems): Body DCUs (Domain Control Units) / ECUs (Electronic Control Units), etc.　　Terminology　　AEC-Q100 Automotive Reliability Standard　　AEC stands for Automotive Electronics Council, a reliability standard for automotive electronic components established by major automotive manufacturers and US electronic component makers. Q100 is a standard that specifically applies to integrated circuits (ICs).　　Shunt Resistor　　A resistor connected in series in the current path to detect the current in the circuit by measuring the potential difference across it.　　Chopper Amp　　An amp circuit designed to minimize signal offset and noise, primarily used for accurately amplifying low-frequency and weak DC signals.　　Auto-Zero Amp　　An amp that automatically compensates for offset voltage (unwanted noise and errors) by continuously sampling and correcting it during operation. This ensures high signal accuracy, making it ideal for applications that demand ultra-precise measurement and signal processing.
2025-06-13 16:56 reading：340
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