Switched Mode Power Supplies (SMPS) - Page 14

codegen · 27th October 2010, 03:26 AM

Okey, thanks for such fast answer. Is the price of a custom voltage same, or is it an extra charge?

Cristi · 27th October 2010, 04:33 AM

The price is same, but you have to send me a mail regarding the desired voltage to prepare the transformer for that.

alkasar · 27th October 2010, 03:02 PM

one question about the new single voltage smps was unanswered: can it be changed to deliver 48V ? thanks

Cristi · 28th October 2010, 10:15 AM

there are 2 more versions available, 48V (45-52V) and 72V (65-75V). the pcb will be the same, just the transformer and capacitors are different.

Cristi · 30th October 2010, 04:39 AM

SMPS500-24 Schematic

Cristi · 2nd November 2010, 04:25 PM

SMPS500R-24 with 48V, 72V and on request other values available: Connexelectronic
I changed the product name from SMPS500R-24 to SMPS500R-Single.

chris7916 · 3rd November 2010, 07:53 AM

Quote:

Originally Posted by Cristi

SMPS500R-72V

Excellent! With some more power, it will perfectly fit DA-1 isn't it?

as it is today, it should be almost OK with 8Ω at average power level.
Is there any plan for SMPS100R-72V?

BTW, in case of use with DA-1, is regulation provided by 7812 clean enough or will it deserve additional filtering?

TCx · 3rd November 2010, 10:22 AM

Hi Cristi, I think that many DIYers would welcome a cheaper lower power single voltage SMPS (perhaps 200 - 300W), especially those who use amp boards from Hifimediy (30V for smaller stereo amps, 48V for T3 amp). Maybe you could make some deal with Nick122147 and sell these SMPS to him in batches so he could resell them with amp modules from hifimediy.com shop. It would be convenient for buyers as they could order both amps and SMPS' from one source and save a bit on postage fees.

Also maybe your existing dual voltage +-24V A350SMPS could be used as single voltage 48V power source?

Just thinking loud...

SoldierAnt76 · 4th November 2010, 08:57 AM

A 200-300 watt, single-voltage SMPS would be a fantastic idea if it cost significantly less than its 500 watt cousin. However, since the least expensive Connex SMPS is $50/40€, I wonder whether the price would be all that much lower. The Meanwell S-350 will still win on cost per watt at $30, and if you're paying extra for a Connex supply you might as well pay a bit more for the additional headroom.

But yeah, a package deal would be a great way to get this SMPS into the hands of more of Hifimediy's users. Or maybe a link on his webpage would be enough.

Cristi · 4th November 2010, 10:06 AM

Thanks for the proposal.
i was considering this aspect, of making lower power SMPS's, 50W, 100W, 150W, 200W. but as you pointed out, the so called "Meanwell" might beat the price at low power. that's also because of their let's say mysterious provenience, if you just take a look at their website you might have the surprise to discover that some models doesn't even exist, but they are still available from various sellers, and ebay is fluded with them. that's because some discovered that a product can sell better if wear a brand name, not necessary legitimate, and they are doing this. some are sold on ebay at 1/3 of the Meanwell catalog price. the surprise come when someone has 2 of them, one genuine and one from that category described above. you will notice the technological advance which made-it possible to get the stated performances with half number or size components compared to a genuine one.
so, i consider making some smaller SMPS's but i will put quality first, not the price. they will be cheaper than the ones which i have now, but i cannot guarantee that will be same or lower price than "meanwell's"

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
switched-mode power suppies	Dimitar13	Everything Else	0	19th February 2008 12:50 AM
PFC Switched-Mode Power Supply	N-Channel	Power Supplies	57	13th June 2005 07:56 PM
Switched mode power supply	MMicke	Car Audio	3	19th February 2005 10:42 AM
Switched mode power supplies	Magura	Parts	13	3rd January 2004 05:44 PM
Switched Mode vs Linear Power Supply	royalmp2001	Solid State	4	12th July 2002 08:04 PM

New To Site?	Need Help?
Register to Participate Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

27th October 2010, 03:26 AM	#131
codegen diyAudio Member Join Date: Dec 2006	Okey, thanks for such fast answer. Is the price of a custom voltage same, or is it an extra charge?

27th October 2010, 04:33 AM	#132
Cristi Banned Join Date: Dec 2008 Location: Hong Kong or Europe	The price is same, but you have to send me a mail regarding the desired voltage to prepare the transformer for that.

27th October 2010, 03:02 PM	#133
alkasar diyAudio Member Join Date: Jan 2009 Location: near Paris, France	one question about the new single voltage smps was unanswered: can it be changed to deliver 48V ? thanks

28th October 2010, 10:15 AM	#134
Cristi Banned Join Date: Dec 2008 Location: Hong Kong or Europe	there are 2 more versions available, 48V (45-52V) and 72V (65-75V). the pcb will be the same, just the transformer and capacitors are different.

2nd November 2010, 04:25 PM	#136
Cristi Banned Join Date: Dec 2008 Location: Hong Kong or Europe	SMPS500R-24 with 48V, 72V and on request other values available: Connexelectronic I changed the product name from SMPS500R-24 to SMPS500R-Single.

3rd November 2010, 10:22 AM	#138
TCx diyAudio Member Join Date: Apr 2010	Hi Cristi, I think that many DIYers would welcome a cheaper lower power single voltage SMPS (perhaps 200 - 300W), especially those who use amp boards from Hifimediy (30V for smaller stereo amps, 48V for T3 amp). Maybe you could make some deal with Nick122147 and sell these SMPS to him in batches so he could resell them with amp modules from hifimediy.com shop. It would be convenient for buyers as they could order both amps and SMPS' from one source and save a bit on postage fees. Also maybe your existing dual voltage +-24V A350SMPS could be used as single voltage 48V power source? Just thinking loud...

4th November 2010, 08:57 AM	#139
SoldierAnt76 diyAudio Member Join Date: Mar 2010	A 200-300 watt, single-voltage SMPS would be a fantastic idea if it cost significantly less than its 500 watt cousin. However, since the least expensive Connex SMPS is $50/40€, I wonder whether the price would be all that much lower. The Meanwell S-350 will still win on cost per watt at $30, and if you're paying extra for a Connex supply you might as well pay a bit more for the additional headroom. But yeah, a package deal would be a great way to get this SMPS into the hands of more of Hifimediy's users. Or maybe a link on his webpage would be enough.

4th November 2010, 10:06 AM	#140
Cristi Banned Join Date: Dec 2008 Location: Hong Kong or Europe	Thanks for the proposal. i was considering this aspect, of making lower power SMPS's, 50W, 100W, 150W, 200W. but as you pointed out, the so called "Meanwell" might beat the price at low power. that's also because of their let's say mysterious provenience, if you just take a look at their website you might have the surprise to discover that some models doesn't even exist, but they are still available from various sellers, and ebay is fluded with them. that's because some discovered that a product can sell better if wear a brand name, not necessary legitimate, and they are doing this. some are sold on ebay at 1/3 of the Meanwell catalog price. the surprise come when someone has 2 of them, one genuine and one from that category described above. you will notice the technological advance which made-it possible to get the stated performances with half number or size components compared to a genuine one. so, i consider making some smaller SMPS's but i will put quality first, not the price. they will be cheaper than the ones which i have now, but i cannot guarantee that will be same or lower price than "meanwell's"