Compact SiGe rectifiers: high efficiency and thermal stability

Targeting automotive, communications infrastructure and server markets, the new 1-3A SiGe rectifiers are of particular benefit in high-temperature applications like LED lighting, engine control units or fuel injection. Design engineers using the new, extremely low leakage devices can now rely on an extended safe-operating area with no thermal runaway up to 175 degrees. 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 per cent lower conduction losses.

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 optimised, allowing small and compact PCB designs. Moreover, simple pin-to-pin replacements of Schottky and fast recovery diodes are possible when switching to SiGe technology.

Jan Fischer, Nexperia product manager comments: "Utilising Nexperia's innovative Silicon Germanium technology gives engineers unprecedented options to design their power circuitry and finally build market-leading products. SiGe perfectly complements Nexperia's power diodes offering which includes more than 100 Schottky and fast recovery rectifiers in the clip-bonded FlatPower (CFP) package. And, we continue to grow this portfolio to always offer our customers a part which is the ideal fit for their application."

The first four AEC-Q101-qualified 120V SiGe rectifiers are already in mass production. A further eight 150V and 200V devices are sampling now. Follow the link for more information, product specs and datasheets for Nexperia's SiGe rectifiers.