Intelligent power switch is optimized for automotive PTC electric heaters

October 16, 2012 // By Paul Buckley
International Rectifier has introduced the reliable AUIR3320S high-side intelligent power switch (IPS) optimized for automotive auxiliary positive temperature coefficient (PTC) electric heaters.

Offering 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 percent automated wafer level visual inspection as part of IR’s automotive quality initiative targeting zero defects. The devices are qualified according to AEC-Q100 standards, feature an environmentally friendly, lead-free and RoHS compliant bill of materials.

Availability and Pricing

Pricing for the AUIR3320S begins at $1.22 in 100,000-unit quantities. Production orders are available immediately.

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