DirectFET2 power MOSFETs
El Segundo, Calif.: International Rectifier has introduced a family of automotive DirectFET2 power MOSFETs for high-frequency switching applications including the output stage for Class D Audio systems.
The AUIRF7640S2, AUIRF7647S2, and AUIRF7675M2 devices expand IR’s portfolio of automotive DirectFET2 power MOSFETs for Class D audio systems. They’re optimized with low gate charge (Qg) to improve total harmonic distortion (THD) and efficiency, while low diode reverse recovery charge (Qrr) further improves THD and lowers electromagnetic interference (EMI).
With a footprint smaller than an SO-8, the AUIRF7640S2 and AUIRF7647S2 Small Can devices deliver 100 W per channel into an 8-Ω load with no heatsink to offer an exceptionally compact class D solution ideal for saving printed-circuit board (PCB) space where multiple channels are required.
The Medium Can AUIRF7675M2 device, which features a footprint that’s 54% smaller than a DPak, delivers 250 W per channel into a 4-Ω load with no heatsink, making it well suited for the sub-woofer output stage of class D audio systems.