I've been having problems with a laptop of mine burning through power supplies. The laptop requires 19v @ 6.3 amps vdc, which works out to 120W. I've gone through 6 different AC power adapters with this laptop and refuse to buy another one.
Since portability isn't required of this laptop, I need it to just sit in the corner and crunch on numbers in matlab I was thinking about getting an ATX type power supply one that might be used for a desktop. Here is the catch, the typical voltages on an ATX power supply are +12, -12, +5, -5, and +3.3v. I'm not entirely sure how sensitive the laptop is to the specced voltage, but I would like to get as close as possible. Obviously a combination of those voltages needs to be used to make 19 volts, but what combination? And that is my question, what external circuitry do I need with the ATX voltages to achieve the 19v?
I've not done much work where the current requirements are more than a couple hundred mA, so I'm not quite sure how to proceed.
Any help will be appreciated.
Since portability isn't required of this laptop, I need it to just sit in the corner and crunch on numbers in matlab I was thinking about getting an ATX type power supply one that might be used for a desktop. Here is the catch, the typical voltages on an ATX power supply are +12, -12, +5, -5, and +3.3v. I'm not entirely sure how sensitive the laptop is to the specced voltage, but I would like to get as close as possible. Obviously a combination of those voltages needs to be used to make 19 volts, but what combination? And that is my question, what external circuitry do I need with the ATX voltages to achieve the 19v?
I've not done much work where the current requirements are more than a couple hundred mA, so I'm not quite sure how to proceed.
Any help will be appreciated.