Junction to Ambient 1, 2 Natural Convection (Single layer board) Junction to Ambient 1, 3 Natural Convection Symbol Unit 208 MAPBGA 324 PBGA 1 RθJA °C/W 42 26 34 22 15 34 23 28 20 15 2 3 4 5 RθJA RθJMA RθJMA RθJB °C/W °C/W...