![]() It could also be the case that a particular application requires more or less immunity than is typical. Perhaps, the more extensive system is already filtering for EMI further upstream, or the noise between the ac inlet and the power supply is far enough away that an internal filter may prove ineffective. Sometimes, instead of using an internal filter, you can think of the design holistically to determine whether inside the power supply is the best location for the EMI filter. You May Also Like: Differences Between Input and Output Plugs for Your Power AdapterĮlectromagnetic interference (EMI) filters are one of the main components that take up significant space in a power supply but may not always be needed. However, finding an off-the-shelf power supply with the features you need without those you don’t can be difficult, if not impossible, and you may be left with a larger, more expensive power supply than you need. For devices like these that will run on low dc voltages, the power supply will significantly impact the device’s overall form factor and cost. If these devices were too large or expensive, consumers would be less inclined to populate their homes with them, and it would defeat the idea of a smart home. If you think about the most popular smart devices for your home on the market today, such as the Alexa voice assistant or the Ecobee smart thermostat, they’re often part of a larger network of smart devices throughout the home. Ron Stull: Smart devices tend to be small and relatively inexpensive. Q1: What is the first concern when selecting an appropriate ac/dc power supply converter for smart devices? Ron Stull, Power Systems Engineer at CUI Inc., speaks with us on how engineers can correctly select core ac/dc power supply converters that provide them with the freedom and flexibility to optimize their conversion needs. Often you are left with more than you need. ![]() In addition to providing a clean dc power rail to the load, these ac/dc power supplies must also be efficient, reliable, and small.įinding an off-the-shelf power supply that is optimized for your needs can be challenging. Still, power is distributed via ac power, creating a need to convert from ac to dc. The new smart features are likely controlled by a sophisticated integrated circuit that runs on a low dc voltage. These devices depend on Wi-Fi connectivity, voice commands, and artificial intelligence to learn and assist in your daily routines. Today, modern smart homes include digital voice assistants, wireless smart bulbs, or smart thermostats. Once relatively “dumb” appliances that ran on ac and mechanical control now have more complex electronic controls and wireless communication integrated into them. With the rise of smart devices and the Internet of Things (IoT), the need for low voltage dc is everywhere.
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