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Design Reliable And Efficient Power Supplies For Industrial Applications

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Design Reliable And Efficient Power Supplies For Industrial Applications

Fairchild claims to have launched industry’s first LLC controller which will enable manufacturers to enhance the reliability and efficiency of the power supplies for server, telecom, industrial, PC and TV applications.

According to the news release, Synchronous Rectification (SR) and Current Mode Control are the two unique features exhibited by the newly launched FAN7688 IC. The SR is a technique for improving the efficiency of rectification by replacing diodes with actively controlled switches such as transistors, usually power MOSFETs or power BJTs.

As mentioned in the press release, the following IC is based on Charge Current Control Technology, which uniquely enables it to utilise current mode control, as opposed to voltage mode control, which is traditionally used in other LLC solutions. Therefore, it helps in providing better control-to-output transfer function of the power stage simplifying the feedback loop design while allowing true input power limit capability, as stated.

Adding further, the FAN7688 incorporates multiple features to ensure high efficiency in power supply applications – typically 97 per cent for 400V input and 12V output applications. The efficiency of the FAN7688 is also enhanced by its comprehensive set of protection functions, including over-load protection, over-current protection, output-short protection and over-voltage protection.

In a media interaction, Gaurang Shah, senior vice president, Analog Power Group at Fairchild, said, “The best-in-class protection features of the FAN7668 are complemented by its outstanding robustness, much of which comes from the direct drive of the secondary side rectification MOSFETs.”

To read the press release, click here.

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