OSTA71A1D is an integrated circuit part manufactured by Optosupply. It is a single dimmable LED driver chip with an analog LED dimming control. It is designed to work with a wide range of LED drivers and can be used for dimming LED lights from 0-100% brightness. The chip has built-in protection features for reverse voltage, short-circuit,and over-temperature, allowing it to operate safely in harsh environments. It also contains a wide range of adjustable features, including over-current limit, dimming frequency, and dimming resolution.