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Self-protecting MOSFETs provide diagnostic feedback

Posted: 08 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:self-protecting MOSFET? diagnostic feedback? n-channel MOSFET?

Self-protecting MOSFETs from Zetex

Zetex Semiconductors has introduced what it claims as the first low-side self-protecting MOSFETs in a SOT223 package designed to provide diagnostic feedback via a separate status pin. The facility aims to further increase the reliability of high-voltage automotive and industrial systems.

The latest additions to the IntelliFET product range, the ZXMS6002G and ZXMS6003G, are 60V, 500-milliohm rated n-channel devices particularly suited to switching loads subject to high in-rush currents, such as lamps, motors and solenoids.

Providing protection against over-temperature, overcurrent and overvoltage fault conditions, ZXMS6002G provides analog indication of normal, current limiting and thermal shutdown modes without requiring additional external components. The availability of the diagnostics enables the development of intelligent automatic fault responses.

ZXMS6003G offers all the functionality of the ZXMS6002G along with a programmable current limit, allowing customization of the overcurrent limit to match system needs, enabling users to reduce power dissipation and system cost. The MOSFET's current limit level is simply configured by connecting an external resistor between the status and in pins.

The ZXMS6002/3 devices have been specifically designed to be tolerant of 60V load-dump transients in automotive applications and unprotected 28V rail transients in industrial systems. Both can be driven directly from 5V MCU outputs.

Pricing starts at 67 cents for ZXMS6002G and 75 cents for ZXMS6003G in 1,000-piece quantities.

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