This part is a kind of semiconductor called LX27901.

Function of this product has High Performance LED Controller.

Manufacturers : Microsemi Corporation

Image and pinout :

Some of the text within the PDF file :

WWW.Microsemi .COM LX27901 ® High Performance LED Controller TM PRODUCTION DATASHEET DESCRIPTION KEY FEATURES The LX27901 is a high performance LED Direct PWM input dimming operation can controller optimized for LCD-TV and other be realized by inputting a dimming pulse multi-lamp LCD display systems and train to DIM pin directly. provides a cost competitive solution for off- The ACU_BRITE algorithm allows the DC PFC LED drive applications. to DC converter to be turned off when the The controller provides a pair of PWM digital dimming operation is at off state to drive signals with adequate capacity to drive eliminate no-load power losses. The a half bridge or other double ended DC to controller also provides a proprietary DC converter circuit with the addition of synchronous [ ... ]

LX27901 PDF Datasheet Download