UL82A中文资料NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER IC数据手册UTC规格书

描述 Description

UL82A 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.UL82A 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. UL82A  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. UL82A 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