SiGe rectifiers combine the best of Schottky and fast recovery diodes

SiGe rectifiers combine the best of Schottky and fast recovery diodes

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Targeting automotive, communications infrastructure and server markets, Nexperia’s new 1-3 A SiGe rectifiers are of particular benefit in high-temperature applications like LED lighting, engine control units or fuel injection. These silicon germanium (SiGe) rectifiers with 120 V, 150 V, and 200 V reverse voltages combine the high efficiency of their Schottky counterparts with the thermal stability of fast recovery diodes.
By Christoph Hammerschmidt


Design engineers using these extremely low leakage devices can rely on an extended safe-operating area with no thermal runaway up to 175°C. At the same time, they can optimize their design for higher efficiency which is not feasible using fast recovery diodes commonly used in such high-temperature designs. By boosting a low forward voltage (Vf) and low Qrr, the SiGe rectifiers have an advantage of 10-20 % lower conduction losses, Nexperia advertises.

The PMEG SiGe devices (PMEGxGxELR/P) are housed in size- and thermally-efficient CFP3 and CFP5 packages that have become the industry standard for power diodes. By featuring a solid copper clip the packages’ thermal resistance is reduced and transfer of heat into the ambient environment is optimized, allowing compact PCB designs. Moreover, simple pin-to-pin replacements of Schottky and fast recovery diodes are possible when switching to SiGe technology.

The first four AEC-Q101-qualified 120 V SiGe rectifier types are already in volume production. A further eight 150 V and 200 V devices are sampling now.

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