Hi all,

Is there any transformerless power supply design capable of providing
the current required for running lpc2106 at 60MHz.

Something with at least 40mA @ 3.3V from european 230V/50Hz.

I'm considering a capacitor type transformerless supply, but something
without bulky (1uF 275V X2) capacitor would be nice.
Any sugestions?

Thanks,
Peter Start a New Thread

Peter,

I'm sure I've seen a chip bringing down the 230 VAC voltage to low DC
voltage in such a way some time ago. But unfortunally I do not
remember the chip manufacturer anymore :-(

Looks like you have to make an intensive "google session" (I assume
it's not that easy to find).

Regards
Herbert

At 09:41 29.10.2007 +0000, you wrote:

>Hi all,
>
>Is there any transformerless power supply design capable of providing
>the current required for running lpc2106 at 60MHz.
>
>Something with at least 40mA @ 3.3V from european 230V/50Hz.
>
>I'm considering a capacitor type transformerless supply, but something
>without bulky (1uF 275V X2) capacitor would be nice.
>Any sugestions?
>
>Thanks,
>Peter Start a New Thread

I remember a similar chip from a couple year ago in some magazine. But
I cant remember the name. I think it was ATxxxx something.( not atmel ).
I had a long date with google on this, but except of some patents no
usefull results.

--- In l..., Herbert Demmel wrote:
>
> Peter,
>
> I'm sure I've seen a chip bringing down the 230 VAC voltage to low DC
> voltage in such a way some time ago. But unfortunally I do not
> remember the chip manufacturer anymore :-(
>
> Looks like you have to make an intensive "google session" (I assume
> it's not that easy to find).
>
> Regards
> Herbert
>
> At 09:41 29.10.2007 +0000, you wrote:
>
> >Hi all,
> >
> >Is there any transformerless power supply design capable of providing
> >the current required for running lpc2106 at 60MHz.
> >
> >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> >
> >I'm considering a capacitor type transformerless supply, but something
> >without bulky (1uF 275V X2) capacitor would be nice.
> >Any sugestions?
> >
> >Thanks,
> >Peter
> Start a New Thread

If you need a simple solution with no galvanic isolation the simpliest
way to achieve the goal is build a RC circuit.
Take a look on this paper:

http://ww1.microchip.com/downloads/en/AppNotes/91008b.pdf

Hope can be useful.
Cheers
Fabio


-----Messaggio originale-----
Da: kuharp [mailto:p...@gmail.com]
Inviato: luned29 ottobre 2007 11.01
A: l...
Oggetto: [lpc2000] Re: Transformeless power supply for LPC2106

I remember a similar chip from a couple year ago in some magazine. But
I cant remember the name. I think it was ATxxxx something.( not atmel ).
I had a long date with google on this, but except of some patents no
usefull results.

--- In lpc2000@yahoogroups .com,
Herbert Demmel wrote:
>
> Peter,
>
> I'm sure I've seen a chip bringing down the 230 VAC voltage to low DC
> voltage in such a way some time ago. But unfortunally I do not
> remember the chip manufacturer anymore :-(
>
> Looks like you have to make an intensive "google session" (I assume
> it's not that easy to find).
>
> Regards
> Herbert
>
> At 09:41 29.10.2007 +0000, you wrote:
>
> >Hi all,
> >
> >Is there any transformerless power supply design capable of providing
> >the current required for running lpc2106 at 60MHz.
> >
> >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> >
> >I'm considering a capacitor type transformerless supply, but
something
> >without bulky (1uF 275V X2) capacitor would be nice.
> >Any sugestions?
> >
> >Thanks,
> >Peter
>







Start a New Thread

At 10:00 29.10.2007 +0000, you wrote:

>I remember a similar chip from a couple year ago in some magazine. But
>I cant remember the name. I think it was ATxxxx something.( not atmel ).
>I had a long date with google on this, but except of some patents no
>usefull results.

This is what I've expexted :-(

On the other hand I just had a look on the web by mylsef as well, and
found OnSemi offering some interesting products. Have a llok at e.g.
http://www.onsemi.com/pub/Collateral/AND8190-D.PDF, possibly this is
interesting for you. Let me know if this fits your needs.

Regards
Herbert

>--- In l...,
>Herbert Demmel wrote:
> >
> > Peter,
> >
> > I'm sure I've seen a chip bringing down the 230 VAC voltage to low DC
> > voltage in such a way some time ago. But unfortunally I do not
> > remember the chip manufacturer anymore :-(
> >
> > Looks like you have to make an intensive "google session" (I assume
> > it's not that easy to find).
> >
> > Regards
> > Herbert
> >
> > At 09:41 29.10.2007 +0000, you wrote:
> >
> > >Hi all,
> > >
> > >Is there any transformerless power supply design capable of providing
> > >the current required for running lpc2106 at 60MHz.
> > >
> > >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> > >
> > >I'm considering a capacitor type transformerless supply, but something
> > >without bulky (1uF 275V X2) capacitor would be nice.
> > >Any sugestions?
> > >
> > >Thanks,
> > >Peter Start a New Thread

I'm aware of that, but I'm looking for something smaller ( X2 caps are
big ).
Just for reference. There is a never microchip AN for Capacitive power
supplies http://www.e-sonic.com/whatsnew/Microchip/power/AN954.pdf

--
Peter

--- In l..., "Fabio Filippa" wrote:
>
> If you need a simple solution with no galvanic isolation the simpliest
> way to achieve the goal is build a RC circuit.
> Take a look on this paper:
>
> http://ww1.microchip.com/downloads/en/AppNotes/91008b.pdf
>
> Hope can be useful.
> Cheers
> Fabio
>
>
> -----Messaggio originale-----
> Da: kuharp [mailto:peter.kuhar@...]
> Inviato: luned29 ottobre 2007 11.01
> A: l...
> Oggetto: [lpc2000] Re: Transformeless power supply for LPC2106
>
>
>
> I remember a similar chip from a couple year ago in some magazine. But
> I cant remember the name. I think it was ATxxxx something.( not atmel ).
> I had a long date with google on this, but except of some patents no
> usefull results.
>
> --- In lpc2000@yahoogroups .com,
> Herbert Demmel wrote:
> >
> > Peter,
> >
> > I'm sure I've seen a chip bringing down the 230 VAC voltage to low DC
> > voltage in such a way some time ago. But unfortunally I do not
> > remember the chip manufacturer anymore :-(
> >
> > Looks like you have to make an intensive "google session" (I assume
> > it's not that easy to find).
> >
> > Regards
> > Herbert
> >
> > At 09:41 29.10.2007 +0000, you wrote:
> >
> > >Hi all,
> > >
> > >Is there any transformerless power supply design capable of providing
> > >the current required for running lpc2106 at 60MHz.
> > >
> > >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> > >
> > >I'm considering a capacitor type transformerless supply, but
> something
> > >without bulky (1uF 275V X2) capacitor would be nice.
> > >Any sugestions?
> > >
> > >Thanks,
> > >Peter
> >
>
>
>
>
>
>
>
>
>



Start a New Thread

Peter,

being curious I was digging into the net by myself and found a
perfect (I think so) solution for your:
http://www.powerint.com/PDFFiles/lnk302_304-306.pdf

The LNK320 is available from DigiKey even in single-piece quantities
for less than 1 Euro.

Best regards
Herbert

At 10:00 29.10.2007 +0000, you wrote:

>I remember a similar chip from a couple year ago in some magazine. But
>I cant remember the name. I think it was ATxxxx something.( not atmel ).
>I had a long date with google on this, but except of some patents no
>usefull results.
>
>--- In l...,
>Herbert Demmel wrote:
> >
> > Peter,
> >
> > I'm sure I've seen a chip bringing down the 230 VAC voltage to low DC
> > voltage in such a way some time ago. But unfortunally I do not
> > remember the chip manufacturer anymore :-(
> >
> > Looks like you have to make an intensive "google session" (I assume
> > it's not that easy to find).
> >
> > Regards
> > Herbert
> >
> > At 09:41 29.10.2007 +0000, you wrote:
> >
> > >Hi all,
> > >
> > >Is there any transformerless power supply design capable of providing
> > >the current required for running lpc2106 at 60MHz.
> > >
> > >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> > >
> > >I'm considering a capacitor type transformerless supply, but something
> > >without bulky (1uF 275V X2) capacitor would be nice.
> > >Any sugestions?
> > >
> > >Thanks,
> > >Peter
> > Start a New Thread

At 13:50 29.10.2007 +0000, you wrote:

>--- In l...,
>Herbert Demmel wrote:
> >
> http://www.powerint.com/PDFFiles/lnk302_304-306.pdf
> >
> > The LNK320 is available from DigiKey even in single-piece quantities
> > for less than 1 Euro.
>
>This one is nice. I'll try to order it from digikey(hope they mail to
>Slovenia)

I'm pretty sure they do: "Digi-Key ships product to over 140
countries worldwide"

>and try it out. It would be interesting to see how big(
>price & size) will the whole power supply get( the 400V 4.7uF caps
>might make it large,

16.5 mm lenght, 10.0 mm diameter according to
http://rocky.digikey.com/WebLib/Nichicon/Web%20Data/VZ%20Alum%20Elec%20Radial%20Cap.pdf

> but I can probably decrease that for lower power.
>Also a full bridge rectification might help ).

Let me know your results, possibly I might need such thingy by myself
in future, you can mail me directly to my email address.

Have fun,
Herbert
> >
> > Best regards
> > Herbert
> >
> > At 10:00 29.10.2007 +0000, you wrote:
> >
> > >I remember a similar chip from a couple year ago in some magazine. But
> > >I cant remember the name. I think it was ATxxxx something.( not
>atmel ).
> > >I had a long date with google on this, but except of some patents no
> > >usefull results.
> > >
> > >--- In
> l...,
>
> > >Herbert Demmel wrote:
> > > >
> > > > Peter,
> > > >
> > > > I'm sure I've seen a chip bringing down the 230 VAC voltage to
>low DC
> > > > voltage in such a way some time ago. But unfortunally I do not
> > > > remember the chip manufacturer anymore :-(
> > > >
> > > > Looks like you have to make an intensive "google session" (I assume
> > > > it's not that easy to find).
> > > >
> > > > Regards
> > > > Herbert
> > > >
> > > > At 09:41 29.10.2007 +0000, you wrote:
> > > >
> > > > >Hi all,
> > > > >
> > > > >Is there any transformerless power supply design capable of
>providing
> > > > >the current required for running lpc2106 at 60MHz.
> > > > >
> > > > >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> > > > >
> > > > >I'm considering a capacitor type transformerless supply, but
>something
> > > > >without bulky (1uF 275V X2) capacitor would be nice.
> > > > >Any sugestions?
> > > > >
> > > > >Thanks,
> > > > >Peter
> > > > Start a New Thread

--- In l..., Herbert Demmel wrote:
> http://www.powerint.com/PDFFiles/lnk302_304-306.pdf
>
> The LNK320 is available from DigiKey even in single-piece quantities
> for less than 1 Euro.

This one is nice. I'll try to order it from digikey(hope they mail to
Slovenia) and try it out. It would be interesting to see how big(
price & size) will the whole power supply get( the 400V 4.7uF caps
might make it large, but I can probably decrease that for lower power.
Also a full bridge rectification might help ).

Regards,
Peter
>
> Best regards
> Herbert
>
> At 10:00 29.10.2007 +0000, you wrote:
>
> >I remember a similar chip from a couple year ago in some magazine. But
> >I cant remember the name. I think it was ATxxxx something.( not
atmel ).
> >I had a long date with google on this, but except of some patents no
> >usefull results.
> >
> >--- In l...,
> >Herbert Demmel wrote:
> > >
> > > Peter,
> > >
> > > I'm sure I've seen a chip bringing down the 230 VAC voltage to
low DC
> > > voltage in such a way some time ago. But unfortunally I do not
> > > remember the chip manufacturer anymore :-(
> > >
> > > Looks like you have to make an intensive "google session" (I assume
> > > it's not that easy to find).
> > >
> > > Regards
> > > Herbert
> > >
> > > At 09:41 29.10.2007 +0000, you wrote:
> > >
> > > >Hi all,
> > > >
> > > >Is there any transformerless power supply design capable of
providing
> > > >the current required for running lpc2106 at 60MHz.
> > > >
> > > >Something with at least 40mA @ 3.3V from european 230V/50Hz.
> > > >
> > > >I'm considering a capacitor type transformerless supply, but
something
> > > >without bulky (1uF 275V X2) capacitor would be nice.
> > > >Any sugestions?
> > > >
> > > >Thanks,
> > > >Peter
> > >
>
> Start a New Thread

Hello,

Maybe you can look here :)

http://www.rohm.com/products/shortform/13hybd/hybd_index0.html Start a New Thread