Overclock.net › Forums › Components › Power Supplies › Powering A DC Booster From My Pc..
New Posts  All Forums:Forum Nav:

Powering A DC Booster From My Pc..

post #1 of 9
Thread Starter 
I plan on hooking up a dc booster module to my computers power supply to translate its 12v current to what I require (50v). My dilema is that while most power supplies state they put out a large number of amps on the 12v rail is that current listed constant or only if the systems components require it.

The reason I'm asking is my dc converter is only rated at an input of 15a max. My power supply puts out 23a. I want to make sure I don't blow the boosters fuse if I connect it. I was under the impression that the power supply has a certain amount of amps available to draw from if required to from its components, and actually the only output that's constant is voltage. I don't believe amps are force fed to our components, but I would rather ask to be sure.

I appreciate your help.
post #2 of 9
Out of curiousity, what do you require the 50V for, and is there a particular reason you'd like to connect it via your pc's power supply?
Just seems to me that it would be easier to pull directly from the socket, then convert down to 50V.
That said, since I don't know what you're planning exactly, that might be a stupid/impossible suggestion.
Behemoth
(15 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 5960x Rampage V Extreme EVGA Titan X EVGA Titan X 
RAMHard DriveCoolingOS
Corsair Vengeance LPX [16GB DDR4 @ 2666MHz] Samsung 850 Pro M.2 512GB Custom loop [mostly EKWB] Windows 10 Pro 
MonitorMonitorKeyboardPower
ASUS PG279Q Dell UltraSharp UP2716D Das Keyboard Professional 4 Corsair HX1200i 
CaseMouseOther
Phanteks Enthoo Primo Logitech MX Master Beyerdynamic Custom One Pro 
  hide details  
Reply
Behemoth
(15 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 5960x Rampage V Extreme EVGA Titan X EVGA Titan X 
RAMHard DriveCoolingOS
Corsair Vengeance LPX [16GB DDR4 @ 2666MHz] Samsung 850 Pro M.2 512GB Custom loop [mostly EKWB] Windows 10 Pro 
MonitorMonitorKeyboardPower
ASUS PG279Q Dell UltraSharp UP2716D Das Keyboard Professional 4 Corsair HX1200i 
CaseMouseOther
Phanteks Enthoo Primo Logitech MX Master Beyerdynamic Custom One Pro 
  hide details  
Reply
post #3 of 9
Thread Starter 
I'm powering my extruder robot, which extrudes plastic components similar to a 3D printer.

I wan to to run it directly from the power supply of the computer, which isn't a problem as long as my initial question can be confirmed.

One needs the other to work so an integrated power source makes more sense.
post #4 of 9
The power supply output is regulated—there are some feedback mechanisms controlling how and when power is drawn and converted to maintain this—to stay somewhat around 12V no matter the load you put on it (until it's too high for it to handle, like above 23A, in which case it should start shutting off). The boost converter draws as much as it needs. Having a power supply with a rating of being able to supply more than you need is no problem.

As you say, the voltage is supposed to be constant; power drawn depends on the load.

Note that if you're using a typical non-enthusiast PC ATX power supply like pretty much every retail unit with 23A or less on +12V, it's probably a group regulated design intended to be used on computers where you're drawing from multiple rails, the output voltage could sag a bit because you're only tapping 12V and this mucks with how the voltage regulation works. I doubt it'd sag enough to be a problem for the boost converter though, especially if you're using well short of the 23A +12V capacity.

Some dated designs may be a little wonky with no load on +5V and +3.3V though, even aside from the above.
post #5 of 9
Quote:
Originally Posted by Storm2313 View Post

The reason I'm asking is my dc converter is only rated at an input of 15a max. My power supply puts out 23a. I want to make sure I don't blow the boosters fuse if I connect it. I was under the impression that the power supply has a certain amount of amps available to draw from if required to from its components, and actually the only output that's constant is voltage. I don't believe amps are force fed to our components, but I would rather ask to be sure.

I appreciate your help.

Think of that 23A supply as "available" power to use. your dc converter is rated to USE 15A MAX of available power.

This is similar to using an 9A vacuum on a 15A wall outlet.

What you would want to be careful of is what voltages the DC converter can use as "input" and that 12v is within that range. (id assume it is, but you should check.)

TL;DR: that last line assumption is correct in this situation. The PSU will only create as much power is used, there is not just 23A of 12V DC waiting to zap your components.
Fooxz Gamer
(18 items)
 
Sager 8130
(16 items)
 
MAXIMUM Server
(19 items)
 
CPUMotherboardGraphicsRAM
i5 2500K AsRock Extreme3 Gen3 GTX 470 Corsair Vengance (2x4GB) DDR3 
Hard DriveHard DriveHard DriveHard Drive
80GB Intel 320 SSD (Boot) 640GB WD Black (apps) 1TB WD Green (Fraps drive) MAXIMUS Server 
CoolingOSMonitorKeyboard
Corsair H50 Windows 7 Pro x64 HP 25" 1920x1080 Filco Majestouch Tenkeyless Cherry MX Black 
PowerCaseMouseMouse Pad
Antec TP-550 "New" NZXT Switch 810 Razer Mamba Steel Series 9HD 
AudioAudio
Logitech G930 Logitech 2.0 Speakers 
CPUMotherboardGraphicsRAM
i7-2670QM Clevo P151HM1 Base nVidia 560m 8GB 
Hard DriveOptical DriveCoolingOS
Corsair Force 3 240GB Combo Way too weak. Win 7 Pro x64 
MonitorKeyboardPowerCase
15.6” LED Backlit 1920x1080 Super Clear Matte Laptop Keyboard 120W Power Brick Chrome Buran Stealth Black messenger bag 
MouseMouse PadAudioAudio
Logitech G700 Steel Series 4HD Onboard > JDS Labs CMoy > Yuin PK1s or AKG K271s Logitech G930 
CPUMotherboardGraphicsRAM
i7 870 ASUS MAXIMUS III GENE nVidia 440GT GSkill 2x4GB 1600mhz 
Hard DriveHard DriveHard DriveHard Drive
Random 120GB Hitachi 2.5in 500GB  Western Digital Green 1TB Western Digital Green 2TB 
Hard DriveOptical DriveCoolingOS
Western Digital Green 3TB USB3 Samsung SATA BluRay Drive Noctua D14 Win 7 Pro x64 
MonitorKeyboardPowerCase
RDP RDP FSP 350w Fractal Design Define Mini 
MouseMouse PadAudio
RDP Nada Optical Out to 5.0 stereo  
  hide details  
Reply
Fooxz Gamer
(18 items)
 
Sager 8130
(16 items)
 
MAXIMUM Server
(19 items)
 
CPUMotherboardGraphicsRAM
i5 2500K AsRock Extreme3 Gen3 GTX 470 Corsair Vengance (2x4GB) DDR3 
Hard DriveHard DriveHard DriveHard Drive
80GB Intel 320 SSD (Boot) 640GB WD Black (apps) 1TB WD Green (Fraps drive) MAXIMUS Server 
CoolingOSMonitorKeyboard
Corsair H50 Windows 7 Pro x64 HP 25" 1920x1080 Filco Majestouch Tenkeyless Cherry MX Black 
PowerCaseMouseMouse Pad
Antec TP-550 "New" NZXT Switch 810 Razer Mamba Steel Series 9HD 
AudioAudio
Logitech G930 Logitech 2.0 Speakers 
CPUMotherboardGraphicsRAM
i7-2670QM Clevo P151HM1 Base nVidia 560m 8GB 
Hard DriveOptical DriveCoolingOS
Corsair Force 3 240GB Combo Way too weak. Win 7 Pro x64 
MonitorKeyboardPowerCase
15.6” LED Backlit 1920x1080 Super Clear Matte Laptop Keyboard 120W Power Brick Chrome Buran Stealth Black messenger bag 
MouseMouse PadAudioAudio
Logitech G700 Steel Series 4HD Onboard > JDS Labs CMoy > Yuin PK1s or AKG K271s Logitech G930 
CPUMotherboardGraphicsRAM
i7 870 ASUS MAXIMUS III GENE nVidia 440GT GSkill 2x4GB 1600mhz 
Hard DriveHard DriveHard DriveHard Drive
Random 120GB Hitachi 2.5in 500GB  Western Digital Green 1TB Western Digital Green 2TB 
Hard DriveOptical DriveCoolingOS
Western Digital Green 3TB USB3 Samsung SATA BluRay Drive Noctua D14 Win 7 Pro x64 
MonitorKeyboardPowerCase
RDP RDP FSP 350w Fractal Design Define Mini 
MouseMouse PadAudio
RDP Nada Optical Out to 5.0 stereo  
  hide details  
Reply
post #6 of 9
Thread Starter 
This is very interesting information. I thought I was correct about the way amps were reflected by power supply manufacturers, but I think allot of people can learn from this. I'm not into overclocking, but desktop manufacturing.

My converter requires anything from 6-40v to convert to 12v-80v so I'm all set even with slight line fluctuation which I didn't experience with my Fluke multimeter.

I now have a much better understanding of how ATX power supplies amp ratings are to be interpreted. I really appreciate the responses.

Thank you all.thumb.gif
post #7 of 9
Quote:
Originally Posted by Storm2313 View Post

This is very interesting information. I thought I was correct about the way amps were reflected by power supply manufacturers, but I think allot of people can learn from this. I'm not into overclocking, but desktop manufacturing.

My converter requires anything from 6-40v to convert to 12v-80v so I'm all set even with slight line fluctuation which I didn't experience with my Fluke multimeter.

I now have a much better understanding of how ATX power supplies amp ratings are to be interpreted. I really appreciate the responses.

Thank you all.thumb.gif
Is it a voltage doubler or a actual adjustable voltage boost converter?
Ayase Eli
(21 items)
 
  
CPUMotherboardGraphicsRAM
Intel E5-2675 V3 ASUS X99-A/USB3.1 Sapphire R9 290X ref Corsair Vengeance LPX 2400MHz C14 
Hard DriveHard DriveHard DriveCooling
Zotac SSD Premium 480GB OCZ Vector 180 480GB Hitachi 7K3000 3TB 7200rpm Barrow 250mm Glass 
CoolingCoolingCoolingCooling
EK Supremacy MX EK-D5 X-TOP Rev.2 + Swiftech D5 Aquacomputer R9 290X "Bitspower EML" fittings 
CoolingCoolingMonitorKeyboard
Magicool 360 Ultra Magicool 240 Slim Dell U2713HM CM Storm MECH 
PowerCaseMouseMouse Pad
FSP Aurum PT 1200 Phanteks Enthoo Pro Logitech G502 Tesoro Aegis X3 Virtus.Pro 
Audio
Audio Technica M50X 
  hide details  
Reply
Ayase Eli
(21 items)
 
  
CPUMotherboardGraphicsRAM
Intel E5-2675 V3 ASUS X99-A/USB3.1 Sapphire R9 290X ref Corsair Vengeance LPX 2400MHz C14 
Hard DriveHard DriveHard DriveCooling
Zotac SSD Premium 480GB OCZ Vector 180 480GB Hitachi 7K3000 3TB 7200rpm Barrow 250mm Glass 
CoolingCoolingCoolingCooling
EK Supremacy MX EK-D5 X-TOP Rev.2 + Swiftech D5 Aquacomputer R9 290X "Bitspower EML" fittings 
CoolingCoolingMonitorKeyboard
Magicool 360 Ultra Magicool 240 Slim Dell U2713HM CM Storm MECH 
PowerCaseMouseMouse Pad
FSP Aurum PT 1200 Phanteks Enthoo Pro Logitech G502 Tesoro Aegis X3 Virtus.Pro 
Audio
Audio Technica M50X 
  hide details  
Reply
post #8 of 9
Oh wait, sorry, I missed the part where you're also simultaneously hooking it up to the computer. That should provide enough draw on the other rails already.

Just make sure you're not going over the total amount the power supply is rated for. How much power is being drawn by the printer, anyway?

Also make sure you're using enough wires for the power drawn. How are you connecting the power supply to the converter? You don't want to draw 10A off of a single 16 AWG line, for example.
post #9 of 9
Thread Starter 
I'm using it as I type this. I'm currently using 18awg shielded cable to the molex rated at 300v so no problems there. I connected the terminals via molex to the converter. It's a converter not a doubler (actually I never heard of that before) It provides up to 10a output variable by a "pot" from the converter, which is more than enough for the extruder.

It's real nice to have a seperate voltage amp rail when you need it.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Power Supplies
Overclock.net › Forums › Components › Power Supplies › Powering A DC Booster From My Pc..