Length Tiny Cooling Fan radiator

A = 2422.5209 * 220 * 10-2 = 5329.545 (cm2)
"Tiny Cooling Fan" radiator surface heat flux heat Q / A = 1110 / 5329.545 = 0.208 (W / cm2)> = 0.039W / cm2
Heat flux calculated radiator surface, much larger than the limit of 0.039W / cm2, even longer thicker "Tiny Cooling Fan" radiator, increasing the surface area, but also far enough, so can not be used with natural cooling, forced to adopt there will be air-cooled heat sink thermal resistance as the main basis for selecting RTf "Tiny Cooling Fan" radiator. Tj, RTj is provided a semiconductor device parameters, P is the power dissipation, RTc can be found from the thermal design of professional books. Here are some of the heat sink choice.