Power switch ideal for automotive motor control

International Rectifier (IR) has introduced a new power switch that promises enhanced automotive motor control. The AUIR3330S Intelligent Power Switch (IPS) has a proprietary active di/dt control feature that significantly reduces conducted EMI and switching losses to simplify design and reduce the overall system cost in automotive motor drive applications.

The power switch's 40V high-side device combines bootstrap regulator, charge pump and high-side driver into a single package to offer a highly integrated solution. The load can be driven up to 40kHz at 100 percent of duty cycle, according to IR.

Also, the AUIR3330S features programmable overcurrent and overtemperature protection that is required by applications operating in harsh automotive environments such as pumps and fans.

Its other features include a current sensing feedback, a diagnostic function and very low current consumption in sleep mode and ESD protection.

"IR's innovative active di/dt control drastically reduces conducted EMI on the input supply without increasing switching losses, enabling a reduction in the size of the EMI filter and the heat sink for more efficient, compact motor systems," said David Poon, IR vice president for Asia-Pacific sales.

According to IR, the new device has passed the AEC-100 standards and is environmentally friendly, lead-free, RoHS compliant and aligned with the company's automotive quality initiative that targets zero defects