ULW2091数据手册UTC中文资料规格书

描述 Description

ULW2091 is a high precision LED  BUCK constant current driver chip. The chip operates in the inductor current critical continuous mode, which is suitable for the non isolated buck LED constant current power supply with 85Vac~265Vac full range input voltage. ULW2091 chip integrated 500V power switch by patent demagnetization detection technology and high voltage power supply technology, without detection and power supply for auxiliary winding, the peripheral devices are more simple, saving the cost and volume of the system. ULW2091 chip with high precision current sampling circuit, while the use of patented constant current control technology to achieve high accuracy of the  LED constant current output and excellent line voltage regulator. The chip operates in the critical mode of inductor current and the output current is not changed with the increase of the inductance and the working voltage of LED. ULW2091 has a variety of protection

特性 Features

, including LED short circuit protection, under voltage protection, over temperature adjustment function and so on.   FEATURES   The integrated 500V power mos.The integrated high voltage power supply function.The inductor current critical continuous mode.Without auxiliary winding detection and power supply.The wide voltage input voltage.±5% LED output current accuracy.The LED short circuit and open circuit protection.The chip power supply under voltage protection.The regulating function of overheating