Würth Elektronik is now including a new ring core double choke in its WE-DCT series as part of its extensive product line. The coupled inductivity with two identical windings is distinguished especially by its very low core losses, very low DC resistance and high saturation currents of up to 120 A. A special feature of the components in this series is that they are stable even at high temperatures – the operating temperature is between -40 and +125 °C and are subject only to minimal aging. This favors the long life of the ring core double choke Thanks to its special iron powder core material, the choke maintains excellent inductance when it undergoes temperature changes, and its low-level leakage inductance is due to its bifilar winding.
The component is thus especially well-suited for high-performance switching controllers. In addition solar inverters, 1:1 flyback converter applications, buck/boost/SEPIC/CUK switching controllers and switching controllers with secondary non-stabilized output voltage also benefit from these properties.
There is a total of 14 types to choose from, with inductances between 0.091 and 100 µH. Additional choke solutions with inductances of up to 400 µH are possible with series and parallel connections.
About Würth Elektronik eiSos
Würth Elektronik eiSos is part of the Würth Elektronik group, one of the fastest growing divisions of the Würth group. Würth Elektronik has 4,800 employees and a turnover of 202 Million Euro in 2010. Würth Elektronik eiSos develops, manufactures and sells passive and electromechanical components.
The company has worldwide presence through the technical sales force and production sites and supports the product design from concept to manufacture. The product range contains EMC components, inductors, transformers, RF components, components for circuit protection, connectors, switches, power elements and assembly techniques. Würth Elektronik eiSos is the largest European manufacturer of passive components.
More information on www.we-online.com
Teseq releases Class A 275 watt broadband high power amplifier suitable for EMC
Posted on 3/05/2012
Teseq has released a new Class A RF amplifier, the CBA 1G-275. The new CBA 1G-275 broadband, 275 watt, 56 dB gain amplifier operates in the bandwidth from 80 MHz to 1 GHz. It packs more punch with an additional 25 watts output compared to its predecessor and is smaller in size 6U case (19 inch), and 550 mm deep compared to the 10U high CBA 1G-250 it replaces. The Teseq amplifier uses high reliability gallium arsenide semiconductor technology to provide low distortion linear performance across the frequency range. Typically harmonics are below 20 dBc.
This is particularly important as antennas generally have lower gains at low frequency thus requiring increased power. The Teseq CBA 1G-275 amplifier is specifically designed for operation under mismatch conditions even when faced with open circuit or short circuit conditions.
The gallium arsenide technology employed in the Teseq amplifier overcomes the relatively low compression characteristics and low efficiency associated with silicon amplifier components. The typical compression ratio 2 dB data is provided as specified by IEC 61000-4-3.