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-   -   simple SMPS (http://www.diyaudio.com/forums/power-supplies/158086-simple-smps.html)

ionutzxpo 6th January 2010 03:46 PM

simple SMPS
 
1 Attachment(s)
hello i found this IR2153 based smps and i don't know if it's ok ive bought all the parts but im scared to go ahead whit the build..."im new in smps build"...thanks

event horizon 6th January 2010 05:14 PM

That's a very bare bones circuit :eek: I see no snubbers on the primary or secondary of the power transformer. Where ever you got the circuit from i hope it told you what type of transformer to use & turns ratios, ferrite material etc. Also no mention of input filtering apart from a simple block diagram, you'll need a couple of filter types to prevent noise getting back into the mains ;)

It's also non regulated, i do hope you realise that.

m-tech 7th January 2010 09:34 AM

1 Attachment(s)
Actually, you can build very nice and small SMPS using IR2153 ( without output voltage regulation ). But your schematic need little improvements ( you need to add snnubers, inpu NTC, and some kind of overcurrent limit.
You can find lots of stuff on net.
I am very happy with my IR2153 based smps.

microsim444 7th January 2010 11:36 AM

Quote:

Originally Posted by m-tech (Post 2038196)
Actually, you can build very nice and small SMPS using IR2153 ( without output voltage regulation ). But your schematic need little improvements ( you need to add snnubers, inpu NTC, and some kind of overcurrent limit.
You can find lots of stuff on net.
I am very happy with my IR2153 based smps.



You tried the SMPS in the above schematic?
I think the only problem there is the IGBTs, i am trying to replave them with any other model.

microsim444 7th January 2010 11:38 AM

Quote:

Originally Posted by ionutzxpo (Post 2037235)
hello i found this IR2153 based smps and i don't know if it's ok ive bought all the parts but im scared to go ahead whit the build..."im new in smps build"...thanks

Some BLOWUPS, may occure with this design. be carfull

m-tech 7th January 2010 12:36 PM

Quote:

Originally Posted by microsim444 (Post 2038293)
You tried the SMPS in the above schematic?
I think the only problem there is the IGBTs, i am trying to replave them with any other model.

No that exactly. I'm using mosfets, not igbt. It 's similiar to this classd.ru, with overcurrent protection.

Florin 8th January 2010 04:55 PM

I want to do the source that the scheme does not look so complicated and I think I can handle. I originally wanted to buy ready-made boards from those who sell on the forum but not serious and treat me with indifference and reacted angrily when I made public that in fact what they sell is not functional yet. so I decided to do one source alone to show that it can be. I have to publish every stage of progress source here.

lorylaci 22nd May 2010 11:43 AM

The circuit needs some modifications, but i've builted my first prototpye SMPS something like that (SPafi's very simple schematic). So it is really good for a start.
Instead of IRFP460 use IRF740 or IRF730, (much lower gate charge and cheaper). The 64k supply resistor should be lowered to 33k or 22k if more current need to drive FETs, but you should use an 5W resistor (the IC contains an internal 15V zener to supply itself).
You should not need 1000uf 200V caps, bit lower should be enough too. You can get about 100W easily, with a small ETD29 transformer, that should be enough for testing, driving small amps.

AP2 22nd May 2010 02:50 PM

Quote:

Originally Posted by lorylaci (Post 2195179)
The circuit needs some modifications, but i've builted my first prototpye SMPS something like that (SPafi's very simple schematic). So it is really good for a start.
Instead of IRFP460 use IRF740 or IRF730, (much lower gate charge and cheaper). The 64k supply resistor should be lowered to 33k or 22k if more current need to drive FETs, but you should use an 5W resistor (the IC contains an internal 15V zener to supply itself).
You should not need 1000uf 200V caps, bit lower should be enough too. You can get about 100W easily, with a small ETD29 transformer, that should be enough for testing, driving small amps.

Hi,
If You want can put complete simple scheme with this IC IR21531. i develop for any companies 2001 (now is free)
I have resolved three points on this circuit.
at switch-off stopped immediatelly.( normally ,decrease with continuos re-start)
protection short-cut (also at start see if ok) this is a problem with this ic, because pseudo-soft-start not have sense (start with fixed pwm and delay to start not save...explosion of mosfet)
use simple EE32 for 250w out (audio peak) not continuos resistive load.
use mosfet 38nb40 to-247.

regards

savu 24th May 2010 02:10 PM

Quote:

Originally Posted by AP2 (Post 2195261)
Hi,
If You want can put complete simple scheme with this IC IR21531. i develop for any companies 2001 (now is free)
I have resolved three points on this circuit.
at switch-off stopped immediatelly.( normally ,decrease with continuos re-start)
protection short-cut (also at start see if ok) this is a problem with this ic, because pseudo-soft-start not have sense (start with fixed pwm and delay to start not save...explosion of mosfet)
use simple EE32 for 250w out (audio peak) not continuos resistive load.
use mosfet 38nb40 to-247.

regards

Hello AP2 ...

I would like to test the schematic, i have a chip on hand (Ionutzxop old board) and i want to make the smps for him. I wanted to use that yamaha schematic + modifications and Mosfet not IGBT + ETD44 core.
but if yours is simpeler I could try it :)

Best regards,

Savu Silviu


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