Texas Instruments has introduced a smart bypass diode in a standard surface-mount package with 15 A current handling capability and very low power dissipation. In a typical application, each SM74611 lowers power dissipation by 80% and reduces the operating temperature inside the junction box by 50°C when compared with a similar box using three conventional Schottky diodes.
When a photovoltaic (PV) solar panel is shaded, the active diode provides an alternate low-resistance path for string current to prevent hot spots that can damage the panel. The device protects the panel and improves panel reliability by boosting efficiency, and the reduced thermal dissipation enables more compact junction boxes with smaller heatsinks.
The SM74611 is offered in a two-terminal D2PAK package that measures 10,2 by 9 by 4,5 mm.
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