DESCRIPTION

UPSSL150 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.

UPSSL150 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.

UPSSL150  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.

UPSSL150 has a variety of protection 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