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The SSL2109AT is a high-efficient controller IC for non-dimmable LED solutions. The SSL2109ADB1097 demo board is a non-isolated buck converter for T8 TLED solutions. It controls a constant current through the LEDs from a rectified universal mains input voltage, with a high power factor >0.9. This 18 W demo board is optimized for a LED string voltage of 70 V / 230 mA. The output voltage can be configured between 30 V and 90 V. The SSL2109AT has an integrated start-up JFET to further improve the overall efficiency.This demoboard is obsolete and not recommended for use. Consider using SSL5015DB1126 or SSL5018DB1124 instead.