Is it possible to give 3 amps to a 3.5 format hard drive?

Question

Iron

There is an adapter from the Chinese SATA - USB 3.0 for HDD 2.5 format, I modified it fry by using 13, 14, 15 pins on SATA POWER, but there was a problem with the 12V source, as I understand it, it’s not possible for him to hook a pulse PSU, there is not a pulse, but one thing, it is 3 amps, the consumption of my HDD when reading / writing was about 1.5 amperes.
I read that you can put him 2 - 2.5 amperes, but I'm afraid it won't dofiga? And isn't 3 amps too much for him?

Answer 1

No matter how many amps the PSU can deliver, the load takes as much as it needs, depending on its own resistance. Learn physics, school course.
And what confuses you in a pulsed power supply, if the power supply of the system unit is also pulsed?

Answer 2

The main thing is that the current that the PSU CAN give out is NOT LESS than what is needed for the HDD, and the voltage is appropriate. And why not impulse? Just in computer power supplies pulse. With such knowledge, I would not climb something to modify there.
A hard drive (and any consumer) will take as much current as it needs at a given voltage. Here in the computer, +5, +12 and sometimes + 3.3V are supplied to SATA. At the same time, on the + 12V channel, the PSU has a maximum current of 12-18 amperes, and more powerful PSUs can have even more. This does not mean that the HDD will eat so much current. 3A for HDD is usually enough, if the voltage does not sag. And then on some PSUs they write "three amperes", but in fact - with such a current it has not 12V, but 10V, and not all equipment will work normally with this.