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Automotive power MOSFET targets DC/DC applications

Posted: 05 May 2011 ?? ?Print Version ?Bookmark and Share

Keywords:power semiconductor? MOSFET? DC-DC converter?

Power semiconductor manufacturer International Rectifier (IR) has launched a new automotive power MOSFET chipset optimized for DC/DC applications used in internal combustion engine (ICE) cars, hybrid and electric vehicles.

DirectFET2, IR's new 40V logic level gate drive chipset, is comprised of the AUIRL7732S2 MOSFET and AUIRL7736M2 MOSFET, which are both optimized to help minimize switching and conduction losses in DC-DC converters.

The devices may also be used in more generic heavy load applications, such as inverter drives on pump and fans and relay replacement in junction box applications.

According to IR, the DirectFET2 power package offers low resistance and parasitic inductance 10 times lower than a D2Pak, resulting in high-frequency switching performance with reduced waveform ringing. This, in turn, helps limit EMI and filter size.

The DirectFET2 chipset, which was developed after several years of research, also features dual-sided cooling and low on-state resistance, making it an ideal solution for DC-DC conversion.

The AUIRL7732S2 logic level MOSFET features low gate charge (Qg) and a PCB footprint that is 38 percent smaller than an SO-8 package, making it well-suited for the control MOSFET position in a synchronous buck converter.

Meanwhile, the AUIRL7736M2 MOSFET is applicable for the synchronous switch position and features low Rds(on) and PCB footprint with the same size as a 5x6 PQFN or SO-8 package.

The low inductance of the AUIRL7732S2 and AUIRL7736M2 enables better switching performance at higher frequencies than traditional MOSFETs.

The devices are qualified according to AEC-Q101 standards. They are made of environmentally-friendly, lead-free and RoHS-compliant bill of materials, being part of IR's automotive quality initiative targeting zero defects.

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