Cheap 24v SMPS - advice needed

ericallan · 6th October 2005, 07:01 PM

Nuuk may be able to help here - I've found some 24v positive SMPSs for about £10 each. May be able to get some more if there's any interest. I've tested the output earth and can see no connection between it and the mains earth or chassis. Are there any other tests I might try before tying two together to make a split psu : 24/0/-24 ?
They are Power-One MAP55-1024 @ 2.5A.

ericallan · 6th October 2005, 07:33 PM

- Power-One have very kindly replied to an email and said that the output earth is floating.
Anyone want some?

Leolabs · 9th October 2005, 11:43 AM

Cant do much with only 2.5A

Nuuk · 9th October 2005, 01:18 PM

Quote:

Cant do much with only 2.5A

Sort of agree although I have run a GC (both channels) off one of the 8080 modules (+12 volts/6A and -12 volts/1A). But you will need efficient speakers!

ericallan · 11th October 2005, 08:05 PM

Wouldnt I have a total of 5 amps with 2 supplies in parallel?

Nuuk · 11th October 2005, 08:14 PM

Quote:

Wouldnt I have a total of 5 amps with 2 supplies in parallel?

I believe so! I have not run mine in parallel though!

jackinnj · 12th October 2005, 12:30 AM

Power-One had the misfortune of orienting a large part of their business towards Cisco in the late days of the internet bubble. As a result their stuff remains comparatively cheap. They make very good supplies.

wes-ninja250 · 12th October 2005, 01:06 AM

Don't forget, you can't just run any two arbitrary SMPS in parallel. FWII, there are usually synchronization issues.

Wes

sagarverma · 12th October 2005, 07:21 AM

don parallel two psu,there are compatibility issues that need to be addressed.
during low of one there can be high of other frying up whole of the system.so don,t do it in any case.serious warning

ericallan · 12th October 2005, 01:25 PM

Quote:

Originally posted by sagarverma
don parallel two psu,there are compatibility issues that need to be addressed.
during low of one there can be high of other frying up whole of the system.so don,t do it in any case.serious warning

Thanks for that - I'll give them a go in series anyway, just for the hell of it.

6th October 2005, 07:01 PM	#1
ericallan diyAudio Member Join Date: Sep 2003 Location: Yorkshire	Cheap 24v SMPS - advice needed Nuuk may be able to help here - I've found some 24v positive SMPSs for about £10 each. May be able to get some more if there's any interest. I've tested the output earth and can see no connection between it and the mains earth or chassis. Are there any other tests I might try before tying two together to make a split psu : 24/0/-24 ? They are Power-One MAP55-1024 @ 2.5A.

6th October 2005, 07:33 PM	#2
ericallan diyAudio Member Join Date: Sep 2003 Location: Yorkshire	Update - Power-One have very kindly replied to an email and said that the output earth is floating. Anyone want some?

12th October 2005, 01:06 AM	#8
wes-ninja250 diyAudio Member Join Date: Feb 2005 Location: Kingston, ON	Don't forget, you can't just run any two arbitrary SMPS in parallel. FWII, there are usually synchronization issues. Wes __________________ Do daemons dream of electric sleep()?

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9th October 2005, 11:43 AM	#3
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Cant do much with only 2.5A

11th October 2005, 08:05 PM	#5
ericallan diyAudio Member Join Date: Sep 2003 Location: Yorkshire	Wouldnt I have a total of 5 amps with 2 supplies in parallel?

12th October 2005, 12:30 AM	#7
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Power-One had the misfortune of orienting a large part of their business towards Cisco in the late days of the internet bubble. As a result their stuff remains comparatively cheap. They make very good supplies.

12th October 2005, 07:21 AM	#9
sagarverma diyAudio Member Join Date: Feb 2005 Location: NEW DELHI	don parallel two psu,there are compatibility issues that need to be addressed. during low of one there can be high of other frying up whole of the system.so don,t do it in any case.serious warning

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