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Rectifiers boast power factor correction efficiency

Posted: 12 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:rectifiers? power factor correction circuits? PFC circuits?

Qspeed Semiconductor has introduced its Q-Series rectifier family designed for use in power factor correction circuits that deliver from 200W to 1,000W of power.

Replacing an ultrafast diode with a Q-Series device typically realizes efficiency improvements of 0.5 to 1.5 percent in the boost converter stage, which is similar to those obtained by using Silicon Carbide diodes.

The Q-Series product family consists of three devices, which are rated to deliver continuous forward current values of 3, 5 and 8A respectively. The 3A device (LQA03TC600) would typically be used in boost converter stages that deliver from 200W to 400W of continuous output power. The 5A device (LQA05TC600) would find its home in converters that deliver from 400 to 700W, while the zone for the 8 A device (LQA08TC600) is from about 700-1,000 W.

In 50,000-piece quantities, the 3A LQA03TC600 is 78 cents each, the 5A LQA05TC600 is 88 cents and the 8A LQA08TC600 is $1.08 each. The devices are now available for high-volume production.

- Ismini Scouras

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