Intelligent power switch suits automotive electric heaters

International Rectifier (IR) announces the AUIR3320S high-side intelligent power switch (IPS), optimized for automotive auxiliary positive temperature coefficient (PTC) electric heaters. Offering very low on-state resistance (Rds(on)) of 4 mohm (max.) at 25° C, the AUIR3320S delivers higher current with a smaller heat sink to reduce system footprint.

The new 40-V device also features current sensing to allow precise monitoring of load current in order to provide additional data to the microcontroller for diagnostic applications. Additionally, the AUIR3320S offers over-current and over-temperature protection, which results in more reliable operation even during short circuit protection, and smooth turn-on and turn-off waveform to limit EMI.

IR's automotive grade IPS products are subject to dynamic and static part average testing combined with 100% automated wafer level visual inspection as part of the company's automotive quality initiative targeting zero defects. The devices are qualified according to AEC-Q100 standards, and feature an environmentally friendly, lead-free, and RoHS-compliant bill of materials.

For more information, contact International Rectifier, 233 Kansas St., El Segundo, CA 90245. Phone: (310) 252-7105.