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EEE Components, PASSIVES

Tantalum and Niobium Capacitors

  • Posted by doEEEt Media Group
  • On May 15, 2023
  • 0
Tantalum and Niobium capacitors belong to electrolytic capacitor types, and they are known for their high capacitance in small dimensions (high energy and power density), reliability and stability of its parameters. Traditionally, tantalums’ advantages over aluminum electrolytic capacitors have been found in terms of capacitance per volume, parameter stability over temperature, and longevity; tantalums
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EEE Components, PASSIVES

Electrolytic Capacitors

  • Posted by doEEEt Media Group
  • On May 12, 2023
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The basic idea of electrolytic capacitor types is to maximize the surface area of electrodes and thus increase their capacitance value and capacitance density. Fine pores and cavities created on the electrode (anode) surface are then covered by a dielectric – usually insulator/semiconducting metal oxides. The electrolyte in a liquid/wet, gel or solid form is used as a medium to contact the high surface from the second side and bring it by its electrical conductivity mechanisms to the second electrode (cathode).
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EEE Components, PASSIVES

Aluminum Electrolytic Capacitors

  • Posted by doEEEt Media Group
  • On May 11, 2023
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The chemically reactive nature of the materials used in aluminum capacitors is problematic on two points: the dielectric layer’s stability and the device’s long-term mechanical integrity. Since the aluminum oxide dielectric layer in these devices is formed through an electrochemical process, it can also be eroded by an electrochemical process simply by reversing the applied voltage. This is why most aluminum capacitors are polarized; the application of voltage with the wrong polarity causes rapid erosion & thinning of the dielectric, resulting in high leakage current and excessive internal heating.
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EEE Components, PASSIVES

Capacitor Technologies Overview

  • Posted by doEEEt Media Group
  • On February 22, 2023
  • 0
Ceramic capacitors are leading miniaturization, downsizing and dominating the market share. The right charts are based on sales VALUE, but if we have these charts in sales VOLUME ceramic capacitors would occupy up to 80% of market share of all capacitors made, on the other hand more expensive tantalum capacitors would shrink its share in volume terms.
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EEE Components, PASSIVES

Evaluation of Active Balancing Circuits for Supercapacitors

  • Posted by doEEEt Media Group
  • On February 9, 2023
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TI developed the circuit based on circuits already in use for Li-ion batteries. The integrated circuit bq33100 [1] provides more than the balancing of supercapacitor banks, being a single-chip solution that offers many features for charge control, monitoring, and protection of maximum of 5 series capacitors.
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