Radiation Characterisation for New Tantalum Polymer Capacitors

Posted by doEEEt Media Group
On June 14, 2019
0

Polymer tantalum capacitor technology was developed in response to demands from the market to lower the ESR of tantalum capacitors while preserving their small case size and high reliability. The technology is promising in several aspects. The higher quality interface between the dielectric and the polymer cathode increases the breakdown voltage of the device, as well as reducing its DC leakage current, even at extreme radiation exposure conditions.

EEE Components, INSPECTION, ELECTRICAL & VERIFICATION, PASSIVES, TESTING

AVX CDR11 to 14 with BG Dielectric no longer offered

Posted by José Francisco Largaespada
On June 14, 2019
0

AVX will cease to manufacture MIL-PRF-55681/4 styles CDR11, CDR12, CDR13, and CDR14 with the BG dielectric. (90 ± 20ppm). AVX will continue to support same styles with BP dielectric (0±30ppm).

EEE Components, PASSIVES, RF & MW

Electromagnetic Radiation of Power Inductors

Posted by doEEEt Media Group
On June 13, 2019
0

Electromagnetic (EM) radiation from inductors in DC/DC converters is no triviality — especially when considering the type and proximity of surrounding components and their susceptibility to magnetic coupling. In this post, we will discuss EM radiation as it pertains to unshielded, semi-shielded, and shielded inductors. We will also cover how EM radiation changes according to different influences.

ACTIVES, EEE Components

DAC – Digital to Analog Converters for Space Application

Posted by José Francisco Largaespada
On June 10, 2019
0

In modern space applications, where a lot of missions recover an enormous amount of data, it is extremely important to have an efficient data acquisition system. These systems take data which is digitalized and then processed in various ways. Once processed, the data is sent to a DAC in order to convert it into analog signals.

ACTIVES, EEE Components, PASSIVES

DC-DC Converters

Posted by Tomáš Zedníček
On June 7, 2019
0

Today, one can hardly find a consumer, industrial or high-reliability electronic device that does not make use of a voltage regulator. Designers basically use two types of regulators, linear LDO (low dropout) and step-down switch-mode DC/DC regulators to convert the voltage to lower level. Switching DC/DC regulators are preferred for applications that require a greater difference between input and output voltages because they are more efficient in such operating conditions.

EEE Components, PASSIVES

MLCC Supply Remains Tight

Posted by doEEEt Media Group
On June 7, 2019
0

“Almost every multilayered ceramic chip capacitor (MLCC) product line saw lead-time increases again in the March 2018 quarter, following a turbulent second half of 2017 where shortages in global ceramic + metal stacking technology continued to plague the global high-tech economy

EEE Components, PASSIVES

Tantalum Capacitors lead times continued to stretch

Posted by doEEEt Media Group
On June 7, 2019
0

Tantalum capacitor lead times continued to stretch in March on a month-to-month basis as vendors and materials suppliers come up with a “perfect storm” of reasons for the sudden shortage of molded chips.

EEE Components, PASSIVES

MLCC prices to rise 40-50% in 2Q18

Posted by Manuel Padial Pérez
On June 7, 2019
0

Major MLCC firms are set to raise their quotes by 40-50% with the new prices to be effective from April 1, according to industry sources. The price rally may have limited impact on EMS and ODM vendors, but will likely become a source of increasing pressure for second-tier device manufacturers such as Sercomm, the sources indicated.

EEE Components, PASSIVES

What is a Dielectric Constant of Plastic Materials?

Posted by doEEEt Media Group
On June 6, 2019
0

The dielectric constant (Dk) of plastic or dielectric or insulating material can be defined as the ratio of the charge stored in an insulating material placed between two metallic plates to the charge that can be stored when the insulating material is replaced by vacuum or air. It is also called as electric permittivity or simply permittivity.

EEE Components, PASSIVES

Designing Custom Inductors: Tips and Tricks

Posted by doEEEt Media Group
On June 6, 2019
0

Many engineers believe that there is a single inductor value that should be used for a given design. They may have read an application note, or a textbook, that sets the value of the current ripple in a buck converter, for example. I would caution becoming complacent in this technique.

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