TDK YNA15 Series Noise Absorbers Suppress Voltage Ringing In SMPS

The YNA15 series thus effectively suppresses 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. Mass production began in November 2012.



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.



In recent years, smartphones and other compact portable devices have evolved toward integrating more and more functions. This in turn leads to higher power consumption and requires optimal design to ensure a suitably long battery life. Noise control in power supplies therefore must be implemented with as few components as possible and without compromising power efficiency. The new YNA15 series can satisfy such needs.



Main applications for the YNA15 series are suppression of voltage ringing in switch-mode power supplies. The main features include internal electrode structure enabling the realization of ESR values from 50 mΩ up to 1 Ω and a rated voltage of 25 V.