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Low EMI and Noise performance with DC/DC switching regulators

Concepts of Switching Regulator EMI and Noise Mitigation

Before we dive into specific application-based examples of noise and EMI mitigation, let's start with the basics. What is noise? What is EMI? What is ripple? How are they measured? What are some common approaches to limiting their effects? This section discusses these topics with a more conceptual approach to serve as a primer for the rest of the series. 

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Low EMI and Noise performance with DC/DC switching regulators

EMI and Noise Mitigation Techniques in Practice

Now that we understand the sources of EMI and noise in switching regulators, and some of the common approaches to mitigating each, let's take a closer look at real-world examples of reducing their effects. In this section we will examine the impacts of various mitigation techniques to help you decide which approach makes the most sense in your design. Techniques covered in this discussion include external component placement, filter options and design, frequency manipulation via spread spectrum or dithering, snubbers, boot resistors, and more.

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Low EMI and Noise performance with DC/DC switching regulators

Achieving low noise and high efficiency for noise-sensitive analog loads

Noise and EMI can be detrimental to sensitive analog signal chain circuitry. For this reason, many engineers automatically default to linear regulators. But, in doing so, they are essentially trading one problem (noise) for another (heat dissipation). In this section we will discuss what types of signal chain loads can be driven directly by a switching regulator to get low noise and EMI without sacrificing efficiency. We will also discuss when a linear regulator is absolutely needed to reach levels of noise not possible with a switcher.

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Low EMI and Noise performance with DC/DC switching regulators

Low EMI and low noise DC/DC conversion in Automotive applications

Because of the potential havoc that interference can wreak in radio and safety critical systems, automotive electronics are subject to the most stringent EMI standards- the most common being CISPR25 Class-5. The materials below provide a discussion around the sources of EMI in an automotive environment and a comprehensive blueprint to understanding how to minimize it's effects.

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High Volt Interactive 2019 training topics

The following topics were presented at High Volt Interactive 2019.

High Volt Interactive 2018 training topics

The following topics were presented at High Volt Interactive 2018.

High Volt Interactive 2017 training topics

The following topics were presented at High Volt Interactive 2017.
battery management systems on-demand technical training

Battery management fundamentals

Browse through basic concepts of battery management. Learn more about our battery management solutions.

battery management systems on-demand technical training

Battery management tools: crash course

Not sure where to get started? Start with the right tools. These videos will guide you through available tools and their configuration. 

battery management systems on-demand technical training

Battery chargers: fundamentals

Learn about basic concepts of designing with battery chargers. Make sure to check our portfolio of battery chargers

battery management systems on-demand technical training

Battery chargers: pick your application

Select the right charger specific for your application. Check our battery management solutions for various applications. 

battery management systems on-demand technical training

Battery chargers: "How to..." problem solvers

Get answers here for some of your "How to..." questions. 
battery management systems on-demand technical training

Battery gauges: get started

Learn about basic concepts of designing with battery gauges. Make sure to check our portfolio of battery gauges.  

battery management systems on-demand technical training

Battery gauges: get help for your device

Get design tips for some of our most popular gauges. 
battery management systems on-demand technical training

Battery monitors

We offer a portfolio of stackable and non-stackable monitors for automotive and non-automotive applications. Watch videos to learn more or check out our website

An Introduction to Multiphase Buck Regulators

The below introductory section features a video briefly discussing what exactly multi-phase buck regulators are, what applications they're suited for, and some of the challenges associated with implementing them. Additionally, the listed resources dive a little deeper into the topics covered in the video, providing further instruction in the beginning of your multiphase journey. 

White Papers 

Designing with Multiphase

In designing with multiphase, Carmen works through a six-phase design for powering the core voltage of a networking ASIC, Marketing Manager George Lakkas explains why multiphase converters are ideal for high currents, and TI engineers blog about common concerns and use contexts.

Blogs

Testing in the Lab

In testing in the lab, Carmen takes a six phase buck regulator through basic validation testing in the lab with plenty of tips and waveforms shared. Let Carmen show you how to test transient response, input and output ripple, phase stability, and thermal performance. Additionally, TI engineers blog about various lab tricks related to multiphase devices.

Blogs

Optimizing PCB layout

PCB layout tips to manage heat dissipation with your switching regulator

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