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Design Parameters

This section will review the design parameters used

Switching Frequency Considerations

This section will cover issue to consider when choosing your switching frequency

Inductor Selection

This section will cover thing to consider when choosing your output inductor

Output Capacitor Selection

This section will cover thing to consider when choosing your output capacitor

Series Capacitor Selection

This section will cover the selection of the series capacitor for the TPS54A20

Capacitor self heating

This section will cover the effect of capacitor self heating on your DCDC design.

Compensation network selection for the TPS54824

This section will cover selection of the compensation components for the TPS54824

Solution Comparison

This section will compare the schematics and components chosen for the 3 solutions used in this comparis

Closed Loop Analysis

This section will compare the closed loop analysis of the 3 different solutions.

Transient Response

This section will compare the transient response of the 3 solutions.

Output Ripple and Jitter

This section will compare the out put ripple and jitter for the 3 different solutions

Efficiency

This section will compare the efficiency results for each of the 3 solutions

Thermals

This section will compare the thermal images and results for the 3 solutions tested.

Solutions Size Comparison

This section will compare the size of the solution for the 3 different designs.

Cost Compsarison

This section will compare the bill of material cost for each solution used.

Summary

Summary of the testing results

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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