In terms of capacitors, miniaturization and high capacity are the constant trend of development. Among them, multilayer ceramic capacitors are the fastest growing. Multilayer ceramic capacitors are widely used in portable products, but in recent years, technological advances in digital products have placed new demands on them. For example, cell phones require higher transmission rate and higher functionality, baseband processors require high speed and low voltage, LCD modules require low thickness and high capacity capacitors. And the harshness of the steam country environment has more special requirements for multilayer ceramic capacitors: firstly, high temperature resistance, the multilayer ceramic capacitors placed in it must be able to satisfy the working temperature of 150 degrees, and secondly, the short circuit failure protection planning is required on the battery circuit. In other words, miniaturization, high speed and high function, high temperature resistance, and high reliability have become the key features of ceramic capacitors.
The capacity of ceramic capacitors changes with the DC bias voltage. The DC bias voltage decreases the dielectric constant, so it is necessary to reduce the dependence of dielectric constant voltage from the material side and optimize the DC bias voltage characteristics. The more common in use is the X7R class multilayer ceramic capacitor, its capacity is mainly concentrated in more than 1000PF, the primary function of this type of capacitor target is equal cross series resistance, in the high ripple current power supply decoupling, filtering involving low frequency signal coupling full circuit
CBB15 CBB16 インバーター溶接機用コンデンサ 金属化フィルム 40μf コンデンサ 1250VDC

CBB15 CBB16 インバーター溶接機用コンデンサ 金属化フィルム 40μf コンデンサ 1250VDC

Low power consumption is more prominent.
Another class of multilayer ceramic capacitors is COG class, whose capacity is mostly below 1000PF, and the primary function target of these capacitors is the loss angle tangent value. The traditional COG products with noble metal electrodes have a DF value of (2.0-8.0) X 10-4, while the COG products with innovative base metal electrodes have a DF value of (1.0-2.5) X 10-4, which is about 31-50% of the former. This type of product is more prominent in the low-power characteristics of GSM, CDMA, cordless phone, Bluetooth, GPS system containing T/R module circuit. They are more often used in various high frequency circuits, such as oscillator/synchronizer, timer circuits, etc.
メール： sales@cucab.com