Testing Transient Response In DC/DC Converters

Focus:

This 9-page application note offers a practical guide to measuring the transient response of dc-dc converters such as the dc-dc converter modules offered by this and other vendors. This app note focuses mostly on testing of isolated dc-dc converters, including the variations (single, dual, and triple output) but also includes some discussion on testing nonisolated point-of-load converters with synchronous rectification. It begins by briefly explaining what transient response is, why it’s important, and what factors contribute to the converter’s transient response. Then, diagrams of basic test setups are presented with instruction on how to apply them, followed by numerous example waveforms to illustrate the variations in transient response (stable, unstable, overcompensated, undercompensated) under different types of load steps. There is some explanation of the waveforms, relating the output voltage transitions back to converter operation and the influence of factors such as output filter capacitance and inductor saturation is discussed.

What you’ll learn:

• How to measure the transient response of dc-dc converters, particularly isolated converter modules
• How to interpret the results of transient response measurements on dc-dc converters

View the Source

Author & Publication:

no author specified, Beta Dyne, Vendor website, Jan 23 2003

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