The TPS75105 is a LDO matching LED current source optimized for low power LED backlighting applications. We used the DSK package (SON-10) in our project.


Block diagram.

Block diagram.


We chose this part because of its ability to drive multiple LEDs on a single signal. It allowed us to drive LEDs to our desired brightness from the low current GPIO pins of the BeagleBone Black. This design was more efficient and less costly than using a discrete BJT.