Power mosfet chipset optimised for automotive applications

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International Rectifier has introduced the DirectFET2 power mosfet chipset, optimised for dc/dc applications used in internal combustion engine cars, hybrid and electric vehicles.

The 40V logic level gate drive chipset comprises the AUIRL7732S2 and AUIRL7736M2 mosfets. Both are designed to help minimise 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 pumps and fans and relay replacement in junction box applications. "The DirectFET2 power package offers low resistance and parasitic inductance 10 times lower than a D2Pak," said Benjamin Jackson, product manager, IR's Automotive Products business unit. "This results in excellent high frequency switching performance with reduced waveform ringing, which in turn helps limit EMI and filter size. Also featuring dual sided cooling and low on state resistance, the new automotive chipset is an ideal solution for dc/dc conversion." According to Jackson, the AUIRL7732S2 features low gate charge and a pcb footprint that is 38% smaller than an SO-8 package. The device is applicable for the synchronous switch position and features low Rds(on) and a pcb footprint the same size as a 5x6 PQFN or SO-8 package. IR says the low inductance of the AUIRL7732S2 and AUIRL7736M2 enables better switching performance at higher frequencies than traditional mosfets.