This part is a kind of semiconductor called BD9488F.

Function of this product has Boost 1channel white LED driver.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Datasheet Boost 1channel white LED driver For large LCDs BD9488F ●General Description BD9488F is a high efficiency driver for white LEDs and designed for large LCDs. This IC is built-in a boost DCDC converters that employ an array of LEDs as the light source. BD9488F has some protect function against fault conditions, such as the over-voltage protection (OVP), the over current limit protection of DCDC (OCP), LED over current protection (LEDOCP), the open detection of LED string. Therefore BD9488F is available for the fail-safe design over a wide range output voltage. ●Features  Current mode DCDC converter  Vout discharge circuit as shutdown  LED protection circuit (OPEN protection, LED OCP protection)  LED protect detection as small PWM dimming signal  Over-voltage prot [ ... ]

BD9488F PDF Datasheet Download