SMPS IR2153 vs ATX transformers - Page 4 - diyAudio
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Old 23rd August 2011, 04:18 PM   #31
AP2 is offline AP2  Italy
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Quote:
Originally Posted by marce View Post
There dosn't seem to be any creepage and clearance between the high voltage input and the low voltage stuff!
??..you mean ac-dc iso? (yes, have 1cm with in side 5mm air gap) this is a ISO line of separation ac-high voltage to dc output.
or you mean dc output to dc low voltage? also this have clearance.

Last edited by AP2; 23rd August 2011 at 04:24 PM.
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Old 23rd August 2011, 04:29 PM   #32
marce is offline marce  United Kingdom
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I was looking at the PCB picture on page 1, I couldn't see no obvious space between the high voltage area and the rest.
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Old 23rd August 2011, 04:33 PM   #33
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Originally Posted by marce View Post
I was looking at the PCB picture on page 1, I couldn't see no obvious space between the high voltage area and the rest.
My photo is at page 2 "IR21531D", blue pcb.
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Old 24th August 2011, 06:03 AM   #34
radio is offline radio  Macedonia
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Question Help!

Hi Roberto (AP2) !
Please if you are able to set a schematic, PCB-layout and parts list of your SMPS, or sent me on my E-mail.
I need this SMPS (2x35V/2x5A) for the stereo amplifier with TDA7294/4om!
Advance thanks for the great help!

Last edited by radio; 24th August 2011 at 06:14 AM.
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Old 24th August 2011, 11:04 AM   #35
marce is offline marce  United Kingdom
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The layout on page 1 post 1, I would say does not conform to required creepage and clearance distance, wich with the voltages present and working to worse cass class 111 polution should be 4mm clearance and 8mm creepage, or 4mm with a 1mm or wider slot in the PCB to ensure an 8mm creepage distance.
Sorry AP2 I wasn
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Old 24th August 2011, 11:48 AM   #36
marce is offline marce  United Kingdom
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Sorry AP2 I wasn't refering to your layout.
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Old 25th August 2011, 10:51 AM   #37
AP2 is offline AP2  Italy
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Quote:
Originally Posted by radio View Post
Hi Roberto (AP2) !
Please if you are able to set a schematic, PCB-layout and parts list of your SMPS, or sent me on my E-mail.
I need this SMPS (2x35V/2x5A) for the stereo amplifier with TDA7294/4om!
Advance thanks for the great help!
Hi,
ok, I put project in this thread at weekend. maybe can help others diy.
for sub is very good (600-700w)

Regards
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Old 25th August 2011, 11:01 PM   #38
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Ok this is main schematic and new layout of PCB. Do anyone have idea for shorst cutcuit protection without curent transformer or curent sens on primary side. Even maybe is better schematic or sugestion with other ic (TL494 on exapmle) but with ATX transforemers in serial for +-50V.

I dont know indutance of that transformer or ratio but on primary side it has 30 turns and on secondary it has 2x7 turns with central GND for 2x12V but in serial its almost 25V. Core is EI 33 without gap

Can one TL494 and one pair of mosfet "push" two of these?
Attached Images
File Type: gif ir2153-2x50v-atx-irf840-smps-devresi-v1.gif (28.8 KB, 1082 views)
File Type: png atx trans smps.png (77.3 KB, 1030 views)
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Old 25th August 2011, 11:22 PM   #39
AP2 is offline AP2  Italy
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Quote:
Originally Posted by Dzony988 View Post
Ok this is main schematic and new layout of PCB. Do anyone have idea for shorst cutcuit protection without curent transformer or curent sens on primary side. Even maybe is better schematic or sugestion with other ic (TL494 on exapmle) but with ATX transforemers in serial for +-50V.

I dont know indutance of that transformer or ratio but on primary side it has 30 turns and on secondary it has 2x7 turns with central GND for 2x12V but in serial its almost 25V. Core is EI 33 without gap

Can one TL494 and one pair of mosfet "push" two of these?
Hi,
now pcb is better but not perfect, some layers need modify.
your trafo (pr=30:sec=7) with ir2153 circuit, produces 36,9V per side @ 230 Vac. also, requires low frequency of switch, around 40Khz max.

regards
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Old 25th August 2011, 11:28 PM   #40
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On example, can I use this layout but two atx transformers (primary in parallel and secondary in serial)

Or do you have schematic of GOOD smp 600-700W 2x50-60VDC. I need for amp D class (for subwoofers)
Attached Files
File Type: pdf 2x50V%20700W.pdf (26.0 KB, 816 views)
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