This part is a kind of semiconductor called HV9910B.

Function of this product has Universal High-Brightness LED Driver.

Manufacturers : Microchip

Image and pinout :

Some of the text within the PDF file :

HV9910B Universal High-Brightness LED Driver Features • Switch mode controller for single switch LED drivers • Enhanced drop-in replacement to the HV9910 • Open loop peak current controller • Internal 8.0 to 450V linear regulator • Constant frequency or constant off-time operation • Linear and PWM dimming capability • Requires few external components for operation Applications • DC/DC or AC/DC LED driver applications • RGB backlighting LED driver • Back lighting of flat panel displays • General purpose constant current source • Signage and decorative LED lighting • Chargers Description HV9910B is an open loop, current mode control, LED driver IC. This IC can be programmed to operate in either a constant frequency or constant off-time mode. It includes an 8.0 - 4 [ ... ]

HV9910B PDF Datasheet Download