Product category: Transformers and Inductors
News Release from: TDK Electronics Europe | Subject: SRW2420EG, SRW2425EG and SRW33EX
Edited by the Electronicstalk Editorial Team on 23 August 2006
Transformers are smaller,
lighter and cooler
Transformers are up to 30% more compact and require up to 20% less mounting space than earlier products with similar outputs
Soon to be available in Europe from TDK Corporation, SRW2420EG, SRW2425EG and SRW33EX transformers are up to 30% more compact and require up to 20% less mounting space than earlier products with similar outputs. TDK has optimised the core materials and core configurations used in standard power supply transformer components to enable engineers to develop smaller and lighter products such as AC adapters and audio-visual devices.
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The transformers can be used in a variety of devices that require low-profile shapes, compactness and low-heat generation such as battery chargers, DC/DC convertors, inverter household appliances, LCD televisions, and plasma display panel televisions.
In order to make the transformers smaller and lighter, TDK selected core materials optimised for specific applications and adopted innovative core configurations.
This series of transformers uses the new ferrite material, PC47, which allows the product to be smaller.
Further reading
Latest power inductors are 60% smaller
Power inductors are designed to offer increased functionality in space-constrained devices
Furthermore, by conducting extensive magnetic circuit simulations, TDK adopted revolutionary elliptical cores in multiple output transformers (such as those used in DVD players), reducing both the core and transformer body volume and weight.
This resulted in a reduction of 22.5% in the mounting area and 27% in volume.
In addition, by investigating optimal bobbin terminal core opening shapes and reducing the core thickness, TDK minimised the weight of cores used in single output transformers.
TDK has applied for six different patents and design registrations with respect to the new core and bobbin configurations.
The SRW2420EG, SRW2425EG, and SRW33EX are RoHS compliant.
The SRW2420EG and SRW2425EG can be used as multiple output transformers, and the SRW33EX as a low-profile multiple output transformer.
Power outputs vary between 25 and 65W, with flyback operating frequencies between 25 and 40kHz.
The SRW2420EG measures 30 x 28 x 25mm, the SRW2425EG measures 30 x 28 x 30mm, and the SRW33EX measures 36 x 42 x 23mm.
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