International Rectifier introduces the automotive-qualified AUIR3240S battery power switch for the combustion-engine

International Rectifier (IR) today introduced the automotive-qualified AUIR3240S battery power switch for the combustion-engine shut-off and restart function (Stop-Start system) that can help reduce fuel consumption in automotive vehicles by up to 15 percent. The AUIR3240S is a highly integrated boost converter designed specifically for the Stop-Start system that halts the engine when a vehicle is stopped in traffic. This system requires a “board net stabilizer” using a power switch that disconnects the starter and main battery from the auxiliary electrical systems during engine start. The AUIR3240S is capable of driving several MOSFETs in parallel to achieve very low on-state resistance (Rds(on)) with current consumption below 50µA. The new device provides 15 V on the output with a wide input voltage (4-36 V). The AUIR3240S also features diagnostic on the output current and a thermal sensor interface for very robust designs.