TDK Develops Multilayer Capacitor That Allows ESR Values To Be Set Using New Internal Structure
TDK Corp. announced that it has developed what it describes as the industry’s first multilayer ceramic chip capacitor with a new internal structure that allows ESR values to be set to any value within a specified range, stabilizes ESR values, and can control circuit impedance (alternating current resistance). Mass production of the capacitor, available in 1608 and 2012 configurations, began earlier this month.
TDK claims that it has developed a capacitor with a new internal structure that allows ESR values to be set while maintaining the same capacitance as earlier products. Because the ESR values of capacitors located in the vicinity of the CPU can be set, there are smaller changes in impedance between the power supply and the CPU over a broad range of frequencies as well as voltage variation limiting effects. Limiting the variation in voltage stabilizes the current signal and eliminates effects on other circuits. In addition, the new capacitor will likely contribute to a reduction in the number of components needed.
The new capacitors are suitable for use in applications that require high power supply quality such as communications base stations and high-end PCs, and will contribute to reductions in the number of components, space saving, and smaller products. The mounting method is the same as that for two-terminal products, making switching from existing components easy.
Although the sizes are the same as earlier products of the same type, resistance has been improved to 1200mΩ for the 1608 product and 500mΩ for the 2012 product and the ESR values can be set to any value within a specified range. By adding resistance components, the variation in impedance frequency is lower than earlier products, which will contribute to reducing the number of components needed compared to earlier products.
