12-17-2017, 12:50 PM
Have to warn about the 1.5 current.
I do not know your current consumption, but some mfrs list max dissipated power, and some don't saying it s internally limited, but everyone gives max op temperature which is usually 125C.
In some Theta-j to Ambient 80C/W, in some 40, not sure if it is with or without heatsink.
But if it is say 80 C/W and you have 1A consumption at 1.5V which is dropped from let's say 7V input at the IN pin of 317, then you have 5.5V dropout tmes 1A which is 5.5W that would create 440 degrees C rise which the 317 will not allow to happen.
So when you see 37Vin and 1.5A I out, it does not mean you can have both (or even lower combinations) at the same time.
I do not know your current consumption, but some mfrs list max dissipated power, and some don't saying it s internally limited, but everyone gives max op temperature which is usually 125C.
In some Theta-j to Ambient 80C/W, in some 40, not sure if it is with or without heatsink.
But if it is say 80 C/W and you have 1A consumption at 1.5V which is dropped from let's say 7V input at the IN pin of 317, then you have 5.5V dropout tmes 1A which is 5.5W that would create 440 degrees C rise which the 317 will not allow to happen.
So when you see 37Vin and 1.5A I out, it does not mean you can have both (or even lower combinations) at the same time.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
