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Industry White Paper

Comparing Trench and Planar Schottky Rectifiers

This white paper offers a closer look at the structure and the benefits of Trench Schottky rectifiers. This resource covers topics such as, why Trench rectifiers are typically the correct choice when a better trade-off between forwarding voltage drop and the leakage current is required, why they should also be selected in high power density applications where the ambient temperature is elevated, and what makes them ideal for applications with switching speeds above 100 kHz.

June 07, 2021 by Avnet

White Paper Overview

Discrete power diodes and rectifiers used in an asynchronous switch mode power supply (SMPS) play a decisive role in the efficiency, reliability and electromagnetic emission of the complete system. A new generation of Trench Schottky rectifiers combines low switching losses and leading thermal performance.

The new parts up to 100 V and 20 A recently released by Nexperia offer low forward voltage and very low Qrr to enable better efficiency at high switching speeds. Additionally, they provide a wide safe operating area (SOA), delivering an extra safety margin and reducing the risk of thermal runaway.

This white paper provides an in-depth look at:

  • The differences between planar and Trench Schottky technology
  • How the SOA advantage of Nexperia's Trench Schottky rectifiers prove useful in applications where higher ambient temperatures have to be tolerated
  • The impact of the lower Qrr of Trench Schottky on the efficiency of a 48V/12V switch-mode converter
  • Why maximum efficiency of switch-mode power converters starts with choosing the right diode technology

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