Improving Output Filtering (A Vicor Power Techtorial)
by Peter Huber, Senior Field Applications Engineer, Vicor, Germany, Vendor website, Dec 31 2008
Focus:
This video demonstrates techniques for accurately measuring the output ripple produced by a dc-dc converter and presents some approaches to filtering this output ripple. The key to the ripple measurement is a modification of the scope probe that eliminates the coupling of the high-frequency components of the common-mode noise onto the grounding clip. Techniques for filtering the output ripple include adding extra capacitors, LC filters, or filters using common-mode chokes to the converter's output. These techniques are demonstrated on a dc-dc converter module. Measurements are performed at different load levels to show the effect of loading on ripple amplitude and ripple switching frequency.
What you’ll learn:
- How to measure the output ripple produced by a dc-dc converter
- How to reduce the output ripple produced by a dc-dc converter using different passive filter techniques
Notes:
One of Vicor's video tutorials.
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