ULW2091

UNISONIC TECHNOLOGIES CO., LTD ULW2091 Preliminary LINEAR INTEGRATED CIRCUIT NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER IC  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 i...