TDK Lambda Magazine | January 2022

Special Tips for Customers for AC-DC Power Supply

TDK-Lambda held a webinar in December titled “The Secrets behind Power Supply”. The lecturer, Chris Maidment, TDK-Lambda’s Technical Marketing Manager, gave an insight into some of the “secret” facts behind key AC-DC parameters that are listed on a typical datasheet. Why secret? Because power supply manufacturers usually don’t include all technical information on the datasheet, from practical reasons. But since the datasheet may be the only document that a customer uses to base his purchase decision - there are hints & tips that can help... Here are just some of the key parameters and questions that Chris covered in the lecture: • Efficiency: Why comparison of efficiency rates between manufacturers is not so simple, and what you need to make sure? • Thermal Measurement: Which rule of thumb can help you estimate the real lifetime of the units? • Over Current: What is the difference between each protection technique? • Mechanical Options: How can you achieve real cooling benefits, and therefore lifetime benefits? • Medical Leakage Currents: Which critical factors determine the probability of what is potentially harmful to a patient / operator?

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