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New Trench Schottky rectifiers increase efficiency

7th May 2021
Alex Lynn

Nexperia has extended its portfolio of Trench Schottky rectifiers with devices rated at up to 100V and 20A. The new parts feature excellent switching behavior and leading thermal performance. They are available in Nexperia’s Clip Bond FlatPower (CFP) packages which have a much smaller footprint than SMA/SMB/SMC components.

Trench technology results in low leakage and also greatly reduces the charge, Qrr, stored in the device. Therefore, Trench Schottky rectifiers deliver very fast switching, cutting both the switching losses of the rectifier and the losses that are induced in the MOSFET in the same commutation cell – a configuration that is commonly used in asynchronous switch-mode power converters.

Nexperia’s PMEGxxxTx devices additionally provide a wide safe operating area (SOA), delivering an extra safety margin and reducing the risk of thermal runaway compared to parts currently available.

Jan Fischer, Nexperia’s product manager commented: “Nexperia’s Trench Schottky rectifiers combine low forward voltage and very low Qrr to enable best efficiency at high switching speeds as needed in switch-mode power converters. Automotive applications including LED lighting, in particular, will benefit from the wide SOA of our parts.”

Nexperia is investing in its portfolio of Trench Schottky rectifiers, now offering 32 devices from 40V to 100V and up to 15A in volume production. A further 17 parts, including the 20A types, are sampling. The PMEGxxxTx devices are housed in Clip Bond FlatPower packages CFP3/5/15(B).

These size- and thermally-efficient packages 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 small and compact PCB designs.

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