02-12-2021, 03:22 PM
(01-28-2021, 04:17 AM)Ralim Wrote: That is entirely correct.
15V/8.5 ohms = 1.7A
1.7A * 15V = ~27W.
The iron does not contain a DC/DC converter so it cannot operate at 20V as it will over-current the supply and the supply will turn off.
Hey Ralim, awesome firmware by the way, thanks!
Just to "show the work" on this all, you're saying the USB-PD 45W supply would be capable of 20V @ 2.25A:
45W / 20V = 2.25A
The iron is a 8.5 ohm load so at 20V would be 2.35A, thus causing over current on the 45W supply:
20V / 8.5 ohms = 2.35A
2.35A * 20V = 47W
Also, on a DC5525 @ 21V the iron tops out at almost 52W (not exactly 60W like on the printing):
21V / 8.5 ohms = 2.47A
2.47A * 21V = 51.8W
Is that more or less the calculation you're talking about here?