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Smart bypass diode touts lowest power dissipation

Posted: 14 Mar 2013     Print Version  Bookmark and Share

Keywords:Texas Instruments  bypass diode  Schottky  SM74611  D2PAK 

Texas Instruments Inc. has rolled out a smart bypass diode in a standard surface-mount package with 15A current handling capability.


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 50°C when compared with a similar box using three conventional Schottky diodes, according to 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 Rs.80.65 ($1.50) in 1,000-unit quantities.

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