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Metrics for Anomalous Charging currents in Polymer Tantalum CapacitorsAnomalous charging currents (ACC) in polymer tantalum capacitors may appear as a temporary short circuit that can last for dozens of milliseconds, cause failures to the parts, or cause malfunctions to fast operating electronic systems. Currently, there is no standard technique or set of metrics to evaluate the level of ACC which compares results obtained by different users and manufacturers. In this work, ACC in different types of capacitors were characterized by analysis of current transients during the constant voltage ramp or power surge testing (PST) techniques. It is shown that although the shape of transients may vary at different test conditions, the transfer charge and energy remain practically the same. The level of ACC is characterized by the energy dissipated in the part during PST. Variations of the dissipated energy with moisture content, test temperature, and voltage are evaluated. Effects of different reflow soldering conditions and long-term (up to 3000 hours) storage at 125 °C are discussed.
Document ID
20230000855
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Alexander Teverovsky
(Jacobs (United States) Dallas, Texas, United States)
Date Acquired
January 18, 2023
Publication Date
February 27, 2023
Publication Information
URL: https://nepp.nasa.gov/
Subject Category
Electronics and Electrical Engineering
Meeting Information
Meeting: 2023 IEEE Electrical Insulation Conference (EIC)
Location: Quebec
Country: CA
Start Date: June 18, 2023
End Date: June 21, 2023
Sponsors: Institute of Electrical and Electronics Engineers
Funding Number(s)
WBS: 817091.40.31.51.02
CONTRACT_GRANT: 80GSFC18C0120
Distribution Limits
Public
Copyright
Public Use Permitted.
Technical Review
Single Expert
Keywords
polymer tantalum capacitor
testing
anomalous transient currents
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