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Schottky diodes operate as low as -40C

Posted: 04 Oct 2011 ?? ?Print Version ?Bookmark and Share

Keywords:Schottky diode? rectifier? energy efficiency?

STMicroelectronics N.V. has revealed a high-voltage Schottky diode that improves energy efficiency and ruggedness of equipment. The 200V rectifiers are compatible with known worst-case operating conditions and provide design margins needed to withstand overvoltages, the company stated.

The STPS60SM200C can be used in high-current AC/DC power supplies delivering nominal DC output voltages in the 30-50V range and are designed for telecom base stations and welding equipment. The devices operate down to -40C.

As one of the few 200V Schottky devices on the market, the STPS60SM200C integrates two interconnected diodes in a three-pin package as alternatives to ultra-fast diodes, claimed ST. Since about 30 percent of today's base station designs still use traditional ultra-fast diodes, ST expects to convert a considerable proportion of these applications to the new rugged devices.

Using ST proprietary process technology, the STPS60SM200C achieves about 2kV ESD-protection, which is higher than comparable Schottky devices when tested according to IEC 61000-4-2, noted the company. This provides increased assurance of survivability against destructive threats such as high-voltage transients, significantly reducing equipment down-time as well as minimizing repair costs. These savings are particularly important for cellular base stations in remote locations that are more time-consuming and expensive to reach and repair.

The products feature an average forward current IF(AV) of 2 x 30A and a maximum operating junction temperature of 175C. They also tout 640mV (typ) forward voltage.

Samples of the STPS60SM200C are available in the TO-247 case, priced at $2.436 per unit for one thousand units. Alternative pricing options may be available for higher quantities.

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