Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Smallest AC/DC converter.. 230V to 12V

Status
Not open for further replies.

berni80

Member level 2
Joined
Jun 28, 2008
Messages
47
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,627
Hi,

I'm looking for a smart solution to realize a AC/DC converter
with these spec:

Vin = 230Vac
Vout = 10V Isolated
Iout = 0.3A

Main targets of the design are:

- Small dimension:
now I've a solution with a 60KHz flyback on a 30x30mm PCB with a
20x20x15mm transformer, but is still too big (mainly the transformer).

- Cost and availability of components. It is possible to use a on-the-shelf
transformer?

My idea is to switch faster (i.e. 200KHz) to reduce the transformer size..
even if I do not find any trasf ready to buy.

Is ther any other interesting topology for this application?

For the transformer I had a look to:
- Coicraft
- Murata-PS
- Pulse Eng
- Coiltronics
- TDK
- EPCOS

Any others?


Thanks!
 

itaig

Member level 1
Joined
Jul 24, 2009
Messages
35
Helped
6
Reputation
12
Reaction score
1
Trophy points
1,288
Activity points
1,513
Have a look on the Fairchild semi site. They have some nice SMPS controllers with integrated power switch. Real easy to use as well. They also have a design program you can download. This will allow you to design the transformer as well.

I would say you could get your design down to using an EFD10 or EFD15 core. The program I mentioned has the data for these cores in the database.
 

KRYCHEK

Member level 1
Joined
Jan 12, 2010
Messages
39
Helped
6
Reputation
12
Reaction score
3
Trophy points
1,288
Location
HUDDERSFIELD UK
Activity points
1,505
hi am wondering if anyone can help me.

Am building an high frequency switching inverter using the tl494,and using a H bridge,

can anyone assist me on how the H bridge converts dc back into ac, i mean how do i do this, and how do i get 50hz from this, many thanks

12vdc.....tl494...push-pull mosfets....transformer...bridge rectifier...h bridge...lc filter..

what i need to know is how to switch 2 on and 2 off at same time resulting in ac 220v 50hz, if u know
what i mean

this is a mod-sine wave btw

many thanks
 

Tahmid

Advanced Member level 5
Joined
Jun 17, 2008
Messages
4,758
Helped
1,791
Reputation
3,574
Reaction score
1,650
Trophy points
1,393
Location
Silicon Valley, California, USA (from Dhaka, Bangl
Activity points
30,545
Hi berni80,
I would say that the smallest and cheapest SMPS for your requirement can be made by using LNK501 IC from Power Integrations.
You can find the datasheet on their website, along with circuit design and design ideas.
They have a software, PIExpert, which can be used to compute the values of resistor, transformer core, transformer winding and other critical parameters.
Site:
www.powerint.com
Hope this helps.
Tahmid.
 

dick_freebird

Advanced Member level 5
Joined
Mar 4, 2008
Messages
7,227
Helped
2,117
Reputation
4,238
Reaction score
1,967
Trophy points
1,393
Location
USA
Activity points
57,948
It's quite possible that some of Vicor's new modules will beat
anything you could roll yourself. They have bridged from a
module maker to developing their own ICs as well, and I've
seen some modules advertised which are nearly the size of
IC packaging (slightly thicker).

I've been through their manufacturing line and it's a thing of
robotic beauty. Very slick.
 

rajudp

Advanced Member level 2
Joined
May 27, 2006
Messages
644
Helped
123
Reputation
246
Reaction score
96
Trophy points
1,308
Location
India
Activity points
4,055
you can use viper22 from st for small power applications. they have a design software to design the full circuit
 

karesz

Advanced Member level 5
Joined
Apr 13, 2008
Messages
2,332
Helped
327
Reputation
654
Reaction score
52
Trophy points
1,328
Location
EU
Activity points
14,632
Hi berni80,
A good smps trafo producer more:
https://www.we-online.de/web/en/wuerth_elektronik/front/frontpage.php
www.we-online.de/katalog/de/we/katalog/index.php?language=en&key=Transformer/Power
Other ones are: Kaschke GmbH; https://www.kaschke.de/produkte.shtml
www.Vogt-Electronic.com GmbH_yet is=Sumida-eu!: https://www.sumida-eu.com/de/produkte/2/21.html
All 3 from Germany.
I would say too; go to Power Integration,www.powerint.com, their have a realy good designer CAD online, you can download it for you, WE is in PI`s datai as trnafo typ to select too...
Search for (i.e.)the family TNY280 from PI...
I think you can make it with the TNY IC(hase integrated MOSFET on + an E16 ferrit, maybe on your relative small sourface....
PI hase very good Appnotes & Sample design collections too!
K.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top