New Products
April 22, 2008
CamSemi Unveils Controller For Development Of Cordless Phone Power Supplies
CamSemi announced a new mixed signal controller which the company claims will enable the rapid development of simple, low cost, switched mode power supplies (SMPS) for cordless phone and other EMI-sensitive or low power consumer applications.
It is claimed that the new C2471 device will allow designers for the first time to easily and quickly meet the demands of FCC part 68 standard for telecommunication equipment and ENERGY STAR 2.0 for energy-efficiency but without needing costly, complex filtering circuitry or specialist design skills. This latest controller targets high volume, consumer applications rated at 1-6W including household telecommunications and audio equipment: which the company claims are two major markets still dominated by linear power converters that typically waste about half the power they consume.
The C2471 is the latest addition to the C2470 family of controller ICs launched by CamSemi to further improve on the size and performance advantages of alternative flyback SMPS offerings. The controllers are based on a patented Resonant Discontinuous Forward Converter (RDFC) topology that maintains ‘EMI clean’ resonant switching over the full load variation. This approach is said to generate exceptionally low levels of EMI, making it well suited for telecommunications, audio and other challenging applications.
"CamSemi is delighted to be announcing our new low power part targeting the cordless phone, audio and other major markets. Designers can now develop low cost, much more energy-efficient power supplies but without having to worry about additional filtering circuitry or any potential development delays to ensure full compliance with FCC part 68 and other EMI standards," said David Baillie, CEO at CamSemi.
The C2471 controller will also help manufacturers to easily comply with the demands of ENERGY STAR 2.0 specification, due to be implemented in November 2008. For example: the company claims that the average active efficiency requirement for a 6W cordless phone application at 120V is 73%, whereas solutions based on C2471 deliver 82% average efficiency. The no-load power consumption specification is 300mW with CamSemi claiming that it cuts this to 160mW.
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Primitive batteries capable of producing ½ volt of electricity were made in Mesopotamia between around 200 B.C. and 200 A.D. They were used mainly for electroplating silver onto copper.