This part is a kind of semiconductor called AL5809Q.

Function of this product has AUTOMOTIVE COMPLIANT 60V Two Terminal Constant Current LED Driver.

Manufacturers : Diodes

Image and pinout :

Some of the text within the PDF file :

ADVNAENWCEPDR IONDFUOCRTMATON Description AL5809Q AUTOMOTIVE COMPLIANT 60V Two Terminal Constant Current LED Driver PowerDI Pin Assignments The AL5809Q is a constant current linear LED driver that provides a cost-effective two-pin solution to LED driving. It has an excellent temperature stability of 20ppm/°C with tight ±5% current accuracy over a wide voltage and temperature range. The AL5809Q comes in various fixed output current versions removing the need for external current setting resistors creating a simple solution for the linear driving of LEDs. It supports both the high-side and low-side driving of LED chains. The AL5809Q turns on immediately and operates with a voltage across its terminals varying from 2.5V up to 60V, enabling it to drive long LED chains. The maximum 60V vol [ ... ]

AL5809Q PDF Datasheet Download