071122-0947 EST USA
NC:
Good device, but it does not solve the power dissipation problem other than you can work with a slightly lower source voltage. Therefore reducing power dissipation at high AC line voltage. Above I had assumed a range of 95 to 135 V which translated to 8 to 13.4 V power supply output, as input to the regulator.
It is no solution for a 36 V input at any substantial current.
A Wakefield 623K (4.75 x 3 x 0.5) has a normal convection air thermal resistance of about 3.5 deg C/watt, or 6.3 deg F/watt. At 6 W that is about a rise of 38 deg F. If you stayed at the 6 watt level of dissipation in the regulator, then a 5 V output and 36 V in you would need to stay below about I = 6/31 = 0.19 A.
. |