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25V noise absorbers tout 0.1µF rated capacitance

17 Dec 2012

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TDK YNA15 series

TDK Corp. has announced a line of noise absorbers in case size 1005 (IEC) to suppress voltage ringing that can be caused by switch-mode power supplies (SMPS). According to the company, the YNA15 series has a rated voltage of 25V and a rated capacitance of 0.1µF. Depending on the type, the YNA15 series features ESR values of between 50mΩ and 1Ω.

When the component is used on the input side of the SMPS, for example, EMI noise caused by voltage ringing can be reduced by 3.5dB (or about one third). The YNA15 series claims to effectively suppress voltage ringing without reducing the power efficiency. A further benefit of the YNA15 series is that it can replace three components: the resistor and capacitor in the snubber circuit and the decoupling capacitor, added the company.

Due to their design, SMPS may require capacitors with higher ESR values than offered by standard MLCCs. In order to meet these requirements and to suppress unwanted EMI noise, TDK developed an internal electrode structure that enables the design of noise absorbers with any desired ESR rating. As a result, EMI noise can be suppressed effectively in the frequency range where the voltage ringing occurs.

The devices are in production.

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