Another Dyson repair on the forums

Mine developed a slightly different fault than all popular battery balancing act of late.
The powerbrush died sometime ago, and now finally I got myself to do some investigating.
Here are some pics that I hope show quite clearly what happened

The magic smoke trail is clearly visible on chip Q5 (most likely mosfet of some sort), unfortunately it also obliterated the second half of the markings, I can read FD.. then a molten crater.
Can someone help me identify this chip?
Much appreciated.





