SMPS IR2153 vs ATX transformers

[AP2]

Originally Posted by marce

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.

[marce]

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.

[AP2]

Originally Posted by marce

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.

[radio]

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!

[marce]

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

[marce]

Sorry AP2 I wasn't refering to your layout.

[AP2]

Originally Posted by radio

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

[Dzony988]

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?

[AP2]

Originally Posted by Dzony988

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

[Dzony988]

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)