This part is a kind of semiconductor called LD7576A.

Function of this product has Green-Mode PWM Controller.

Manufacturers : Leadtrend

Image and pinout :

Some of the text within the PDF file :

LD7576A 1 1/29/2009 Green-Mode PWM Controller with High-Voltage Start-Up Circuit and Adjustable OLP Delay Time REV. 00b General Description The LD7576A brings hi gh performance, and com bines highly inte grated functions, protections an d EMI-improve solution. It’s cost. The LD7576A features near-lossless high v oltage startup circuit, green-mode power-saving operation, leading-edge blanking of the curre compensation. nt sensi ng an d i nternal slop e They are also equipped with protections, an id eal so lution for those cost-sensitive systems, redu cing comp onent count and overa ll s ystem Features z z z z z z z z z z z High-Voltage (500V) Startup Circuit Current Mode Control Non-Audible-Noise Green Mode Control UVLO (Under Voltage Lockout) LEB (Leading-Edge Blanking) on CS Pin Int [ ... ]

LD7576A PDF Datasheet Download