Before we dive into specific application-based examples of noise and EMI mitigation, let's start with the basics. What is EMI? How is this different from noise? 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.
Some systems simply require more attention than others when it comes to EMI. In this section, we will examine some of those specific end applications and provide some helpful hints to reach EMI targets with each.
Comité International Spécial des Perturbations Radioélectriques (CISPR) 25 is the typical starting point for evaluating conducted and radiated emissions in automotive systems. This topic addresses the unique challenges of designing power converters to pass CISPR 25 requirements, including background information on the CISPR 25 standard and test setups. We explain common noise sources in power converters and various techniques to reduce conducted and radiated emissions, including input filter design, frequency selection, mode selection, snubber design, shielding and layout.
Explore several subtle nuances to significantly improve power supply performance. Examples include: the hidden advantages of synchronous regulators, a module that features the best attributes of a switcher AND an LDO, and tips to reduce system noise by manipulating output capacitor combinations.
This training series covers critical power supply design parameters such as EMI mitigation, heat dissipation, and loop compensation. Each training module features guidance using the LM4360x/LM4600x Synchronous SIMPLE SWITCHER® step-down voltage regulator as an example device.
This video series takes an in-depth look at voltage mode and current mode control in comparison to DCAP2 and DCAP3 control modes for step-down DC/DC converters.
Learn the features and benefits of TI's new DC/DC power topology, the series capacitor buck converter, and get started using it in your space-constrained design.
Learn about MicroSiP power module construction and how they have greatly increased the power density of power supplies over the years. See the evolution of discrete power converters to their MicroSiP power module counterparts. Specific comparisons and tradeoffs for the TPS82130, TPS82085, and TPS82671 are discussed.
EMI (electromagnetic interference) mitigation is a critical step in the design process in most electronic systems, and especially so in the automotive world. In many cases, automotive OEM emissions requirements are even more stringent than both national and international standards bodies like the FCC. Unfortunately, by their nature, switching regulators are sources of EMI; but, in order to keep power supply designs small and efficient, switchers are a critical component. So how can you reap the benefits of a switching regulator while still meeting challenging EMI requirements?
In today’s computing environment, CPUs, FPGAs, ASICs and even peripherals are growing increasingly complex and, consequently, so do their power delivery requirements. To handle the higher demands, multiphase regulators are becoming increasingly common on motherboards in many areas of computing--from laptops and tablets to servers and Ethernet switches. Designing with these regulators is more challenging than using conventional switchers and linear regulators, but the benefits of multiphase outweigh the complexity for high-performance power applications.
Why should you understand power management?
Mitigating switching regulator EMI and noise is seen by engineers as a black art. Mess with the feng shui of the PCB layout too much, and the system may not pass CISPR standards. Because of this, many power designers simply turn to linear regulators as a guaranteed way to avoid the headache of reducing emissions.
Managing heat dissipation has always been a critical concern for any power supply designer, and this concern has only grown in importance as output current levels have increased while IC package sizes have gotten smaller. This page serves as your ultimate resource for all training materials and technical documentation related to keeping your switching regulator running cool.
There are numerous ways to address thermals. This library of training content is broken out by some of these key approaches to improving the thermal performance of your switching regulator.
As switching converters have evolved, they have taken on a host of new features to operate more efficiently and quietly. To some, however, all these new features listed on the front page of the datasheet may seem foreign. This training series dives into those features to explain the true benefits of each and help you decide which are necessary for your power supply design. Specifically covered in this series are the buck converter topics of:
DC/DC Power Modules are best known for being compact, highly-integrated power supply design options. This training series examines some of the lesser-known advantages of TI power modules:
- How do Power Modules simplify power supply design?
- Inductor withstand voltage
- High temperature storage testing
The topics will cover system design issue and solution for Building Automation, Power Delivery and Test & Measurement. TI experts introduce the latest technology and innovation system reference design. Discover ways to enhance the time-to-market and create safer and efficient industrial systems.
Battery life cycle is a key for high-cell-count battery pack-based end-equipment. Low quiescent current (Iq) consumption of DC-DC converters is a major feature that helps achieve longer battery life cycles. TI’s latest buck converters boast low Iq consumption as they maintain high efficiency in the active mode (heavy loads) as well as extend battery life during standby modes. This training will cover an overview of battery powered industrial applications and the specific power consumption requirements for these end equipments.