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Smart bypass diode boasts lowest power dissipation

Posted: 21 Mar 2013 ?? ?Print Version ?Bookmark and Share

Keywords:bypass diode? Schottky? power dissipation?

Texas Instruments Inc. has rolled out a smart bypass diode in a standard surface-mount package with 15A current handling capability. Touted by the firm as offering the industry's lowest power dissipation, each SM74611 lowers power dissipation by 80 per cent and cuts the operating temperature inside the junction box by 50C when compared with a similar box using three conventional Schottky diodes, noted the company.

When a photovoltaic (PV) solar panel is shaded, the SM74611 active diode provides an alternate low-resistance path for string current to prevent hot spots that can damage the panel. The SM74611 protects the panel and improves PV solar panel reliability by boosting efficiency, and the reduced thermal dissipation enables more compact junction boxes with smaller heat-sinks.

The SM74611 smart bypass diode is available in volume from TI and its authorised distributors. Offered in a two-terminal D2PAK package that measures 10.2 x 9 x 4.5mm, the SM74611 is priced at $1.50 in 1,000-unit quantities.

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