STMicroelectronics AN1768 Application Note Schottky Diodes Avalanche Power

This document introduces the application of Schottky diodes in Switch Mode Power Supply (SMPS) and how to select the appropriate Schottky diode. By using a simple tool provided by STMicroelectronics, designers can determine whether a given ST Schottky diode can withstand the avalanche energy under application conditions.

Brand: STMicroelectronics
Category: Other Electronics
Document type: Application Note
Language: English
Pages: 2
File format: PDF
File size: 47 KB
Published: 06 August, 2012
Updated: 29 September, 2023
MD5 checksum: 82FA319D0D8D6B522A36C68E24DAC930
PDF: STMicroelectronics AN1768 Application Note Schottky Diodes Avalanche Power PDF

About this manual

The document provides a tool and design rules for determining if a specific ST Schottky diode can withstand avalanche energy generated by an application. It details parameters such as operating junction temperature, pulse duration, and avalanche energy.

A design example is included using the STPS20H100CT diode in a flyback converter to demonstrate how to verify that the guaranteed avalanche energy exceeds the application requirements.

What's inside

Introduction
Design Rules
Table 1: Parm(1us, 25°C) values
Derating Curves
Design Example
Flyback Converter Topology

Frequently asked questions

What is the reference avalanche power for ST Schottky diodes?

STMicroelectronics guarantees a reference avalanche power given at tp=1us and Tj=25°C.

How is the admissible avalanche energy calculated in the design example?

The maximum admissible avalanche energy for STPS20H100CT at 10ns and 100°C is 48.6uJ per diode.

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