# Help identifying component (LED matrix PCB)

I have a led matrix PCB without a driver and I'm trying to figure out how to control it. I'm having trouble identifying one of the components on the PCB.

Here is a scheme of a part of the PCB:

These 6-pin parts have WDFN-6 package or similar. They have labels AP1 (I also met APN for the same parts). Here are the pictures:

I thought it might be a Dual LDO Regulator or something similar, but it doesn't match the actual scheme.

Please provide any thoughts on what it might be.

• Are you sure pins 3 and 4 are not connected on all those chips? How many layers on the board? Apr 30 at 12:12
• They are connected the same way as the first (left) one, I just skip this to not overcomplicate the scheme. Each unknown SMD component has a PUMH1 connected (double resistor-equipped transistor). I don't know how many layers the bord has, at least 2. Also, note that the last (right) SMD is rotated 180 deg. @HandyHowie Apr 30 at 12:38