Whether for efficiency or due to the device physics, many applications require voltages ranging in the tens, hundreds, or even thousands of volts; the circuits which produce these voltages start with basic charge pumps and extend to voltage multipliers with simple schematics but many subtleties. Lower-voltage circuitry is the trend, with ICs and designs operating […]
Axial-leaded, hermetically sealed wet electrolytic tantalum capacitors
AVX Corporation announced that several of its TWA Series axial-leaded, hermetically sealed wet electrolytic tantalum capacitors are now qualified to MIL-PRF-39006/33A. Designed to deliver high-reliability, high-CV performance in harsh-environment military, defense, avionics, and industrial applications, including satellites, DC/DC power supplies, power converters, bulk energy storage, and pule power circuits, the new TWA M39006 Series capacitors have […]
Stacked polyester capacitors meet 85°C/85 percent RH requirements
Cornell Dubilier announces availability of its Type RA multilayered film capacitors for 125 °C operation. Type RA capacitors are constructed using stacked metallized polyester protected with an impregnated sealant, which eliminates the need for an external case. This package style offers the highest energy density technology available for switching power supplies, DC to DC converters […]
Choosing a capacitor? Ripple current capability matters as much as Farads
by Derick Stephens, KEMET Corporation Selecting capacitors for decoupling and filtering in power circuits may seem like a basic chore for electronics designers. Getting it right, however, can critically influence reliability and longevity, but is complicated by the fact that parameters tend to change with factors such as the temperature and operating frequency. Proper attention should […]
Capacitors in renewable energy
It pays to know the distinguishing features of electrolytic, film, and super capacitors when planning applications where energy efficiency is important. MORRIE GOLDMAN, ILLINOIS CAPACITOR INC. RENEWABLE ENERGY SYSTEMS all have a common need for high-efficiency power circuits. Whether the original source of energy is light, heat, or mechanical motion, ancillary circuitry will probably either […]
AC filter capacitors cover 250 to 400 Vac with capacitance range of 1 to 70 µF
TDK Corporation has extended its EPCOS B32754 to B32758 series of AC filter capacitors. They now cover a range of voltages from 250 V AC to 400 V AC and offer capacitances of between 1 µF and 70 µF. The capacitors comply with IEC 61071: 2007 and are extremely robust, even at high humidity. This […]
Conduction cooled capacitors include direct mounting options
Illinois Capacitor has expanded their lineup of their HC and LC Series Conduction Cooled Capacitors, to include new direct mounting options on the HC Series. These devices are a fit for resonant power circuitry having very high current demands. With the rugged appearance of mechanical components, they have ratings of up to 1,200 amps RMS and […]
Wet tantalum supercapacitors now rated for 175°C max operating temp
AVX Corp. has increased the maximum operating temperature for its TWD High-Temp Max-Cap (HTMC) Series axial leaded, hermetically sealed wet tantalum capacitors from 125°C to 175°C. Based on a well-established wet tantalum design, the newly improved TWD HTMC Series capacitors provide the highest DC capacitance and the highest operating temperature of any T4-case capacitor available […]
Three-phase capacitors for filter apps cover 250 to 850 Vrms
TDK Corporation now offers the extensive B3237 series of EPCOS MKD three-phase capacitors for filter applications. The capacitors cover a voltage range from 250 VRMS to 850 VRMSin 10 stages and are available with capacitances of between 3 x 10 µF and 3 x 400 µF. Depending on the type, the capacitors are designed for currents of up to 60 A. Internally, the […]
Power Electronics Top Talks in June on EDABoard.com forums
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around power electronics. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com Design precaution of 78xx and 79xx series regulators – I am looking into using these old regulators. My main concern is the […]
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