As I read the schematic of QN9080DK Board and found USB_Vbus seems not connected to on board QN9080, I want to ensure it may work before I do the test...
Power Source to on board QN9080 : Lithium Battery
Vcc to on board 9080 : 1.8V
Jumper settings (refering to the QN9080 DK User's Guide, the settings for QN9080)
1. JP7 : 1-2 short (Page 5, item 7)
2. JP16 : Open (Page 24)
3. Remove R48, R49, R50 (Page 24)