Yellow with AVX and KEMET tantalum capacitor-based disadvantages and performance analysis:
Solid tantalum capacitors in 1956 by the American Bell Labs developed the first success of its excellent performance, small size capacitors can achieve larger capacity products. Tantalum capacitors shape varied and suitable for surface mounting of small and sheet type components. Tantalum capacitors not only in military communications, aerospace and other areas of application, and the application range tantalum capacitors are still a lot of use to industrial control, video equipment, communications devices and other products.
1, the advantages
The full name of tantalum capacitors tantalum electrolytic capacitors, also belongs to an electrolytic capacitor, tantalum metal media do not like to use as an ordinary electrolytic capacitor electrolyte tantalum electrolytic capacitors that do not need to use as an ordinary plated aluminum capacitor paper around system itself has almost no inductance, but also limits its capacity. In addition, because there is no electrolyte tantalum capacitors inside, it is suitable for working at high temperatures. This unique self-healing properties, which ensure that the advantages of long life and reliability.
Solid tantalum capacitors electrical performance, wide operating temperature range and diversity, excellent volumetric efficiency, has its unique characteristics: the working medium is tantalum capacitors tantalum pentoxide thin film layer formed on the surface of the tantalum metal. This layer is composed of oxide film dielectric capacitors and one end of the pole combined into a whole, can not exist alone. Therefore, the unit volume has a very high operating field strength, has a particularly large capacitance, i.e., very high specific capacity, it is particularly suitable for miniaturization.
2, the disadvantage
Smaller capacity, the price is more expensive than aluminum capacitors, and withstand voltage and current capability is weak. It is used in large-capacity filter places, like near the CPU socket to see the figure of tantalum capacitors, and more with ceramic capacitors, electrolytic capacitors used in conjunction with applied voltage or current is not the place.
3, the filtering performance
Excellent performance tantalum capacitor, the capacitor is small and they can reach a larger capacity products, the power filtering, bypass and other uses few competitors.
Tantalum electrolytic capacitor having a storage battery, charge and discharge properties, mainly used for filtering, energy storage and conversion, mark bypass, coupling and decoupling as well as the time constant of the components. In the application you want to pay attention to its performance characteristics, proper use will help to give full play to its functions, which consider working environment, such as heating temperature, and to take other measures derating, if used improperly affect the working life of the product.
In the course of their work tantalum capacitors, with automatic repair or isolation oxide film defect where the performance, so that the oxide film medium to receive reinforcement and restore its proper insulation ability, without being continuous cumulative damage. This unique self-healing properties, which ensure that the advantages of long life and reliability.
4, the main features
Characteristics of tantalum capacitors _ tantalum capacitors have very high electric field strength, and more than any other type of capacitor, in order to ensure its miniaturization.
Characteristics of tantalum capacitors _ tantalum capacitors can easily get a larger capacity, the power filtering, bypass and other uses few competitors.
Characteristics of tantalum capacitors, tantalum capacitors _ unidirectional conductivity, namely the so-called "polar", the application shall supply the positive and negative direction access current, capacitor anode (positive) then the power "+" pole, the cathode (negative) then the power of the "-" If you pick the wrong capacitor not only play a role, but the leakage current is large, the core will heat a short time, destroy the oxide film immediately lapse.
Characteristics of tantalum capacitors _ tantalum capacitors have a certain limit operating voltage level value, but the disadvantage with regard to the power transistors or integrated circuits, is unimportant.
Characteristics of tantalum capacitors _ tantalum capacitors with storage capacity, charge and discharge performance.
5 package
Common type (standard common type): AVX tantalum capacitors with an example:
R type (0805/2012-12, P-type (0805/2012-15), A-type (1206/3216), B-type (1210/3528), C-type (6032/2312), D-type (2917/7343- 31), E-type (2917/7343-43), V-type (2924/7361/38)
Special volume type: F-, G-, H, K-, N-, S-, T-, W-, Y-Special volume type: F-, G-, H, K-, N-, S-, T-, W-, Y-
The main series AVX tantalum capacitors: TAJ series (ordinary common type), TPS Series (low impedance type), TLJ series, TLN Series, TPM Series, TCJ series, TCN series, TRJ series, THJ Series (black material), TAW Series , NOJ series, NLJ series, NOS series, NOM series, NPV series, TPA series (DIP tantalum capacitor), TEP series (DIP tantalum capacitor), TAR series (axial tantalum)
6, polarity
SMD tantalum capacitors have marked a positive end, the other end is negative, the positive long legs lead tantalum, tantalum capacitors can not be reversed, reversed after ineffective.