For many engineers, layout for EMI mitigation is a black art. It may seem like the slightest adjustment could be the difference between passing or failing CISPR standards. Because of this, some power designers may shy away from using devices with switching elements as a guaranteed way to avoid the headache of reducing emissions. But this may be trading one problem for another, as switching devices generally have better efficiency and thermal performance.
Efficiently addressing EMI starts at the device selection stage. On-silicon technologies like spread spectrum or unique packaging approaches like HotRod™ QFN can help reduce EMI before we even begin the discussion of component layout and filtering.
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.
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.
These training videos will be used to better understand LDOs, and includes more information on designing the best ADC power supply, stabilizing an LDO, measuring LDO noise and power supply rejection ratio, sourcing 5-A or more with current sharing regulators, measuring thermal resistance between junction temperature and ambiance, and measuring the ADC power supply rejection.
The presentation addresses the design consideration of USB Type-C power delivery. USB Type-C is the new trend of Industrial, automotive and personal electronics devices. In the training, audience will be able to learn more about USB Type-C power delivery (PD) requirement and understand architecture of USB Type-C PD, AC/DC power source.
View a broad curriculum of training for designing with various power supply topologies, as well as step by step instructions to build complete power topology reference designs.
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.
Get tips, tricks and techniques to solve common power supply design challenges with power experts.
Voltage supervisors increase the system reliability and robustness by ensuring that power rails are active only during stable power supply. This is achieved through functions such as: precise voltage monitoring, over-voltage protection, power failure indicator, processor monitoring, power sequencing, battery backup, and reset latching.
In this series, you will learn about the:
If you are brand new to PoE, we recommend watching all four videos at your own pace for a complete overview. If you’re more experienced with the technology and just need a refresher on various concepts, jump right into the topic that meets your needs. Or consider watching our more advanced series below on all things related to the IEEE 802.3bt design.
The new IEEE 802.3bt standard has introduced the capability for designers to utilize PoE for high-power applications (up to 90W at source and 71.3 at input). The below videos provide insights into whether the .bt standard is right for you, but if you’re already evaluating or compliant to .bt, we’ve also shared resources to help you navigate working with non-standard PD types, response to power demotion events and more.
Quiescent current, or IQ for short, is one of the most critical design concepts for power supply designers to master. IQ, or the amount of current when your IC is in a no-load or non-switching state, may be an easy concept to digest at first, but can come with tradeoff decisions. The resources below can help demystify IQ, as well as provide a path forward with TI’s new starting line-up of ultra-low power management ICs.
Keep these resources in your toolbox, and come back often to ensure you’re effectively optimizing your whole power tree for optimal system lifetime
Engineer It is an educational, “how-to” video series where TI experts provide fundamental knowledge and solutions to overcome design challenges. Here, you can learn how to spin your motor in minutes, avoid amplifier input/output swing limitations, test and isolate power supplies and more from industry experts.