EDN

Designing second stage output filters for switching power supplies

These days switching power supplies are nearly ubiquitous and used throughout every electronic devices. They are valued for their small size, low cost, and efficiency. However, they have the major ...
EDN

Capacitor Input Filter: Formula & Calculation

This is a simple means of calculating the required size of the input filter capacitor in a basic power supply, or calculating the peak-to-peak ripple voltage in an existing supply. It works by ...
New Electronics

TI unveils stand-alone active EMI filter ICs for high-density power supply designs

Texas Instruments (TI) has unveiled what it claims is the industry’s first stand-alone active electromagnetic interference (EMI) filter integrated circuits (ICs). Intended to help engineers implement ...
Electronic Design

Radical Approach: Active EMI Filter IC Shrinks Higher-Power AC-DC Supplies

A new IC-based approach to EMI filtering in ac-dc power subsystems dramatically cuts inductor size and offers other benefits as well. The nature of the EMI problem in ac-dc supplies and its ...
Electronic Design

3 Ways to Reduce Power-Supply Noise

Noise is a constant problem in power-supply design. While there are FCC limits on the electromagnetic interference (EMI) radiating out into the air as well as the conducted noise that your design ...