Diodes Incorporated has introduced a family of field-plated Super Barrier Rectifier (SBRFP) devices for automotive use, including parts rated at 2 A, 3 A and 8 A. Diodes says the parts are drop-in replacements for comparable Schottky and PN junction diodes, and that their low forward voltage and reverse leakage suit DC-DC converters, reverse-polarity protection circuits, battery charging systems, automotive LED lighting and transmission control systems.
Diodes says its patented field-plated rectifier technology, built on a metal oxide semiconductor (MOS) manufacturing process rather than the metal-semiconductor junction of a conventional Schottky rectifier, overcomes the limitations of both Schottky and PN junction diodes.
The 8 A SBRFP8A60P5Q has a maximum forward voltage of 0.55 V at 8 A. A rectifier’s conduction loss is the product of its forward voltage and current, so a lower drop means less heat to remove at higher currents.
The 2 A SBRFP2M60P1Q and 3 A SBRFP3M60SAFQ have maximum reverse leakage currents of 12 µA and 7 µA, respectively, at 25° C and a 60 V reverse voltage, according to their data sheets. Schottky leakage climbs steeply with temperature, and Diodes says the low leakage helps minimize the risk of thermal runaway under high-temperature operating conditions.
Avalanche energy ratings reach up to 145 mJ, depending on the device. The data sheet lists that rating for the SBRFP2M60P1Q at an avalanche current of 2 A. Diodes puts the family’s avalanche capability at five to 10 times that of conventional Schottky rectifiers, which the company says lets the parts withstand surge events, load dumps and other transients common in automotive electrical systems.
The SBRFP2M60P1Q comes in a PowerDI123 package, the SBRFP8A60P5Q in PowerDI5 and the SBRFP2M60SAFQ and SBRFP3M60SAFQ in SMAF. All four operate across a junction temperature range of -55° C to +175° C.
In 1,000-piece quantities, pricing is $0.08 for the SBRFP2M60P1Q, $0.11 for the SBRFP2M60SAFQ, $0.13 for the SBRFP3M60SAFQ and $0.26 for the SBRFP8A60P5Q.
Source: Diodes Incorporated
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