App note from Coilcraft on how to calculate the power dissipation of an inductor. Link here (PDF) Inductors are not typically rated by power, however an approximation of the power-handling capability of an air core or ceramic core chip inductor can be estimated using the data sheet specifications for current and resistance.
Coilcraft’s app note on why inductor’s voltage ratings are uncommonly mentioned in most applications. Link here (PDF) Voltage ratings are often specified for many electronic components, including capacitors, resistors and integrated circuits, but traditionally this has been rare for inductors. Recent trends, particularly the introduction of higher voltage rated semiconductor devices, have created a new […]
Application example from Coilcraft on how coupled inductors gain advantage over separately wound inductors, calculations included. Link here (PDF) The SEPIC (Single-Ended Primary Inductance Converter) topology is used in applications that require characteristics of both a buck and a boost regulator, specifically the ability to step up and step down the input voltage. Most often […]
Designing efficient power converters guide from Coilcraft. Link here (PDF) In high frequency DC-DC converters, inductors filter out the AC ripple current superimposed on the DC output. Whether the converter steps the voltage down – buck – or steps the voltage up – boost – or both up and down – SEPIC, the inductor smooths […]
An app note from Coilcraft on inductance and Q parameters which are the important factors of an inductor and how these values are found. Link here (PDF) The accurate measurement of an inductor has always been more difficult than the measurement of other passive components. The primary difficulty with coil measurements lies in the fact […]
Coilcraft’s application note about why there are no voltage ratings specified on inductors. Link here (PDF) Voltage ratings are often specified for many electronic components, including capacitors, resistors and integrated circuits, but rarely for inductors. This article addresses the reasons why working voltage ratings are not typically published for inductors. There are challenges to determine […]
Coilcraft’s application note on inductor performance or efficiency when used in high frequency applications. Link here (PDF) ESR vs frequency curves can be used to predict inductor losses in higher frequency converters, but careful consideration must be given to the wave shape (ripple current) of each application.
Murata’s application note about inductors and its specifications. Link here (PDF) Reading a specification for an inductor is considered a simple task, however, there is often some confusion even over the meaning of relatively straight forward parameters.
App note from Würth Elektronik on WE-LHMI inductors’ visual crack apperance and their effects. This document helps understanding the influence of visual asymmetry around the core which may occur during the manufacturing process of WE-LHMI series inductors. The WE-LHMI core is not a solid core, instead it is an iron powder molded around the winding. […]
A practical guide for the selection of power inductors for DC/DC converters from Würth Elektronik. Link to the app note here, alternatively the whole article in PDF can be found here
Sometimes we need to measure inductance and capacitance, but why buy a tool when you can build it? Phil Rice designed this LC meter with a PIC16F628, 16×1 LCD display, and some passive components. You might be able to build this with components you already have.