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Power supply ref design promises 94% efficiency

Posted: 26 Mar 2009 ?? ?Print Version ?Bookmark and Share

Keywords:efficiency power? reference design? power supply?

Fairchild Semiconductor Inc. makes it easier for designers to develop more efficient power supplies and to meet stringent energy efficiency specifications with its 200W DC/DC power supply reference design.

The RD212 reference design offers high efficiency (up to 94 percent) and low noise characteristics due to its zero voltage switching (ZVS) technique. It provides a 24V output at 8A and offers protection functions. These protection functionsover-voltage protection, overload protection, over-current protection (OCP), abnormal OCP and internal thermal protectionprotect the power supply from adverse electrical events.

With user's guide, application notes and schematics, it can quicken the design cycle and drive higher levels of efficiency in power supply designs. The RD212 reference design is an optimal tool for simplifying design, increasing efficiency and conserving space in flat-panel TVs, PCs, servers, street lighting and various off-line power supplies.

The RD212 features the FSFR2100, a green FPS power switch that integrates a pulse-frequency-modulation controller with a high-voltage gatedriver, two fast recovery MOSFETs and important protection features such as soft-start and burst operation into a thermally-efficient SIP package. This switch offers a soft-switching approach that reduces switching losses, even though the actual switching frequency increases. Through its ZVS technique, switching losses are further reduced, allowing the switch to handle up to 200W without a heat sink.

Fairchild offers a portfolio of reference designs that simplify system design, reduce board space, ensure system reliability and accelerate time-to-market. With the worldwide energy concerns, designers are increasingly relying on semiconductor suppliers to come up with innovative ways to improve efficiency during normal operation and during standby mode. By offering a production-ready design, reference designs are instrumental in enabling OEMs to shorten their design time and bring their system to the market quicker.

Complementing the RD212 reference design is the FEB212 evaluation board that contains a user's guide, application notes and a full tested board to evaluate your design. The reference design costs $68.75.

- Henri Arnold
EE Times Europe

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