Improving Output Filtering (A Vicor Power Techtorial)

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.

View the Source

Author & Publication:

Peter Huber, Senior Field Applications Engineer, Vicor, Germany, Vendor website, Dec 31 2008

This article summary appears
in the HOW2POWER Design Guide.

The Design Guide offers
organized access to
hundreds of articles
on dozens of power conversion
and power management topics.

The Design Guide search results
include exclusive summaries
and accurate "how to" analysis
to help you make faster,
more informed decisions.

Search
for more articles