HP DL580 G3 PSU 1300W Conversion to 13.8v PSU - Page 1
Forum section: electronics / projects

author: smartshah
author_rank: Newbie
timestamp: January 07, 2020, 12:25:08 pm
content: Hi Electrical Geniuses, I am in need of some help. I have looked elsewhere, and can not find the concrete path of doing something the right way.I have purchased a Server PSU, to convert the output to 13.8v PSU. But I also want to add a Power Switch with a Current and Voltage Adjustable Potentiometer. I am aware that there is a Over Voltage Shut down on this too. But I am hoping that someone who has done this can guide me along my journey. Below is the Model and Make of the PSU.- Hp DL580 G3 1300W PSU- Model or Part Number DS1300-3- Part Number 337867-501- Spare number 406421-001I have attached Pictures of others modifying this, but I want to put this PSU into a little Wooden or Plastic box. Have a on Switch on the Outside, and Have a Digital Multimeter Screen on the Outside where I can adjust the Current and Voltage.These can be adjusted to 13.8 volts and can push out 106 Amps at 230V. But I will not be using more than 70Amp current.I can not find any schematics on the circuit etc. I am very handy with electrical devices, but before I go ahead and go through hours of probing I thought I may ask you wizards for assistance.Many Thanks

author: smartshah
author_rank: Newbie
timestamp: January 13, 2020, 11:11:20 am
content: Come on guys there must be some electrical genius out there to help me with this, I am willing to pay a small fee via paypal as a gift if you can help me achieve my goal here

author: Boscoe
author_rank: Frequent Contributor
timestamp: January 13, 2020, 06:36:56 pm
content: What des it normally chuck out? 48V?You need to remember these devices are designed to do one thing only, the designed output voltage. Do you really think the output windings and output caps can handle the extra current and ripple? The list goes on.Hacking about with a 1.3Kw PSU is only going to lead to disaster.

author: smartshah
author_rank: Newbie
timestamp: January 13, 2020, 06:57:47 pm
content: This chucks out 12v. It is rated at 106A with input of 230v. All i really want is to get 13.8v stable with 70amps. The rest like a potentiometer etc is not obligatory

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 13, 2020, 07:38:40 pm
content: Can't make out the, huh, thumbnails of thumbnails. Don't know what's being shown there.I guess you need someone with particular knowledge of this unit? If this thread keeps bumping, you may get lucky and someone runs across it that knows; otherwise, it would seem you'll have to take it on by yourself (or significantly increase your reward bounty..).Good luck,Tim

author: smartshah
author_rank: Newbie
timestamp: January 13, 2020, 08:22:17 pm
content: Hey Tim, thank you for writing. I guess a response is better than none. The thumbnails are trying to illustrate the PSU itself. And people have converted this for RC applications. I thought someone on here may have more knowledge about these PSUs.

author: oPossum
author_rank: Super Contributor
timestamp: January 13, 2020, 08:36:08 pm
content: Using something like the RD6006 with a server power supply is the easy way to get adjustable voltage and current. There are limits to what can be done with simple mods to the server supply itself.RD6006 thread:https://www.eevblog.com/forum/blog/eevblog-1265-$53-360w-lab-bench-psu!/msg2804292/

author: smartshah
author_rank: Newbie
timestamp: January 13, 2020, 08:41:55 pm
content: Thank you opossum. I dont mind if Adjustable voltage is a deep shot. If i can get stable 13.8v DC with around 70amps i am more than happy. I am aware this one has a over voltage cut out, so will also need to rectify that. Someone has done it, but did not respond to my message its been around 4 months.

author: oPossum
author_rank: Super Contributor
timestamp: January 13, 2020, 09:00:49 pm
content: A common way to raise the voltage a little is to use the remote sense feature. A resistor between the remote sense terminals or from +sense to ground is often all that is needed. You would have to experiment to find a suitable value resistor. Start with ~10k and see what happens.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 14, 2020, 12:06:20 am
content: Usually there's a trimpot inside, or you can snoop around for the sense or feedback wires/components as above, and tweak that.It is indeed close enough that component ratings and values should be fine. At worst maybe there's an overvoltage protection that needs to be adjusted similarly (or bypassed).I guess I'm confused that you say people have done this before, but you don't know how.Unless you mean, like, in general, but haven't seen this one done specifically.Should be pretty straightforward to find, but as I don't have one of these units handy, you'd have to tip me at least the value of one before I can figure it out myself.Tim

author: oPossum
author_rank: Super Contributor
timestamp: January 14, 2020, 12:12:23 am
content: The pinout is documented.

author: smartshah
author_rank: Newbie
timestamp: January 14, 2020, 12:59:36 am
content: Hi Tim, there was a guy who converted it to 13.8v DC but he never wrote how he did it with this particular PSU. I opened this up earlier today and everything is packed tightly.. there are about 4 extra PCBs and it has monstrous FETS. These are very powerful and stable PSU. Hence why i grabbed this particular one. I cant find the the company who actually designed or made the PSU so I can take peak at the schematics. Like i said i am willing to pay someone who can assist me to achieve my goal with this PSU. The caps are in an awkward location.. not easy to reach them to drain them

author: smartshah
author_rank: Newbie
timestamp: January 14, 2020, 02:15:06 am
content: Hi epossum thank you for your input. I have seen this diagram before. I think i have added the thumbnail of how to get the PSU on. So i am after 2 things.1. Output voltage increase to 13.8 volts stable under load2. To prevent the PSU from cutting out due to over voltage.If you believe i can do this from the pins in the diagram, then that is perfect. But i have to be precise as there is very limited space to attach or solder a wire or a resistor on these pins.Thank you in advance.If you can list the parts or components i will need, i will get them from a component store tomorrow and start hacking this.

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 14, 2020, 04:15:26 am
content: Having hacked a 1200W HP to output up to 16V for charging a large 4S pack, there appears to be two OVP mechanisms to defeat. I looked for resistors connected to the output and then tried to figure out what they did. There will be quite a few so be prepared to do a lot of reverse engineering. If there are any comparators in that area, try monitoring the outputs with a scope while turning up the output voltage.

author: smartshah
author_rank: Newbie
timestamp: January 14, 2020, 10:39:27 am
content: HI NihaoMike,Dont these PSU usually have OVP IC? I have seen a few vids where the IC pin is shorted to ground with a resistor. This PSU is small and light for the power it packs. Everything is pretty tight inside. This may be simpler than it sounds