IR Introduces Automotive DirectFET®2 Power MOSFETs Optimized for Class D Applications

Aug 19, 2010 | Technology Media

EL SEGUNDO, Calif. — International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today announced the introduction of a family of automotive DirectFET®2 power MOSFETs for high frequency switching applications including the output stage for Class D Audio systems.

The AUIRF7640S2, AUIRF7647S2 and AUIRF7675S2 devices expand IR's portfolio of automotive DirectFET®2 power MOSFETs for Class D Audio systems, and are optimized with low gate charge (Qg) to improve THD and efficiency while low Diode Reverse Recovery Charge (Qrr) further improves Total Harmonic Distortion (THD) and lowers EMI.

With a footprint smaller than an SO-8, the AUIRF7640S2 and AUIRF7647S2 Small Can devices are capable of delivering 100W per channel into an 8Ohm load with no heat sink to offer an exceptionally compact class D solution ideal for saving PCB space where multiple channels are required. The Medium Can AUIRF7675M2 device, which features a footprint 54 percent smaller than a DPak is capable of delivering 250W per channel into a 4Ohm load with no heat sink making it well suited for the sub-woofer output stage of class D audio systems.

"The new DirectFET®2 devices complement the previously released AUIRF7665S2 to offer designers alternative voltage and RDS(on) ratings for different power levels in Class D Audio systems," said Benjamin Jackson, product manager, IR's Automotive Products Business Unit.

As with all DirectFET® products, the new devices offer minimal thermal impedance and parasitic package resistance and inductance to deliver excellent power density and efficiency facilitated by dual-sided cooling.

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

Datasheets, application notes and qualification standards are available on the International Rectifier website at Spice and saber models are available on request.

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