Engineering Considerations for the Substitution of Solid Tantalum and Tantalum Polymer Capacitors for Surface-MountMLCCs
●Due to current bottlenecks in the procurement of surface-mount ceramic capacitors, designers are looking for substitutes to keep their production lines running smoothly,and to find long-term replacements for hard to find ratings.This article will examine key performance characteristics that will help streamline the evaluation process of alternative capacitor technologies for the replacement of multilayer ceramic chip capacitors(MLCCs).The most likely MLCC candidates for successful replacement by tantalum technology are the higher capacitance values in case sizes from 0402 to1210.Applications that require high capacitance for filtering or voltage stabilization are good candidates for replacement.
●There are two primary capacitor technologies that are most often considered for surface-mount applications:electrostatic and electrolytic.The most common electrostatic types are MLCCs and film capacitors.The most common electrolytic types are aluminum and tantalum(including both solid and polymer tantalum technologies).When looking to substitute for high capacitance MLCCs,it makes sense to pick tantalum electrolytic devices to get the broadest overlap in size,surface mount ability,capacitance values,voltage ratings,and reliability.
●Although top-level comparisons of capacitance,voltage,tolerance,and size are useful as a starting point,MLCCs and surface-mount tantalums utilize different designs and materials in their construction.As a result,they have different electrical and mechanical properties.Instead of throwing massive amounts of performance data at the design team,this paper will attempt to look at the key parametric differences that relate to the performance of the capacitors.In addition,some helpful hints and suggestions for testing will be offered with the goal of successfully substituting solid tantalum or tantalum polymer capacitors for MLCCs with maximum efficiency.
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Solid Tantalum Capacitors 、 Tantalum Polymer Capacitors 、 Surface-Mount MLCC |
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Technical Documentation |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2019/02/20 |
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1.1 MB |
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