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Switches protect from repeat short circuits

Posted: 18 Dec 2009 ?? ?Print Version ?Bookmark and Share

Keywords:power switch? current-sensing? protection circuit?

AUIPS7121R/AUIPS7141R power switches

International Rectifier debuts the AUIPS7121R and AUIPS7141R 65V high-side intelligent power switches (IPS). The devices have built-in current-sensing and protection circuits. They are suited for harsh 24V automotive environments such as under-the-hood truck junction boxes.

The AUIPS7121R and AUIPS7141R offer a comprehensive set of protection features to ensure safe reliable switching. Moreover, the new devices' over-current shutdown, over-temperature shutdown and active clamp circuit assure safe operation and protection under repetitive short circuit conditions.

"Engineers face a major hurdle designing truck junction boxes that meet tough new performance standards under short-circuit conditions. As a result of its protection features, the AUIPS71xx family can operate for extended periods of time, sustaining several millions of cycles under short-circuit conditions to provide a reliable robust solution for harsh 24V automotive environments such as under-the-hood junction boxes," said David Jacquinod, product marketing manager, automotive business unit of IR.

The AUIPS71xx family provides an accurate current feedback of 5 percent over the entire operating temperature range while turn-on and off-time are optimized to minimize noise in EMI sensitive automotive applications.

The devices are qualified according to AEC-Q100 standards, feature an environmentally friendly, Pb-free and RoHS-compliant BOM, and are part of IR's automotive quality initiative targeting zero defects.

Available in a DPAK package, pricing for the AUIPS7121R and AUIPS7141R begins at $1.40 each and $0.90 each respectively in 100,000-unit quantities. Production orders are available immediately. Prices are subject to change.

For application notes on power switches click here.

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