Mystery voltage regulator

H

H

Guest
In a Siemens Gigaset cordless phone, a voltage regulator is defective.
The phone is very similar to this picture:

http://broadcasting.br.funpic.de/images/dect_inside_GigaSet4000-Classic_FP_PCB1.jpg

The regulator is the one labeled "10" in the picture.

It says "4307V33" on it, in addition to "AJ431". Here's closeup image
of the regulator. There's a visible logo, but I don't recognize it:

http://home.c2i.net/helgew/temp/4307V33.jpg

If I could find out what voltage should come out of which pin, I could
use any regulator with the same parameters. But I am unable to find
any information at all about it.

There's also this picture:

http://broadcasting.br.funpic.de/images/dect_inside_GigaSet4010-Classic_FP.jpg

, where the regulator is labeled "N600", but that's probably just the
part name in this particular design.

Does anyone have a clue where to find information?
 
"H" <not@availab.le> wrote in message
news:eek:qkk959g84sakfqn9f96rfoctbdk342vun@4ax.com...
In a Siemens Gigaset cordless phone, a voltage regulator is defective.
The phone is very similar to this picture:

http://broadcasting.br.funpic.de/images/dect_inside_GigaSet4000-Classic_FP_PCB1.jpg

The regulator is the one labeled "10" in the picture.

It says "4307V33" on it, in addition to "AJ431". Here's closeup image
of the regulator. There's a visible logo, but I don't recognize it:

http://home.c2i.net/helgew/temp/4307V33.jpg

If I could find out what voltage should come out of which pin, I could
use any regulator with the same parameters. But I am unable to find
any information at all about it.

There's also this picture:
Click to expand...
How do you know it's a regulator?

Tom
http://broadcasting.br.funpic.de/images/dect_inside_GigaSet4010-Classic_FP.jpg

, where the regulator is labeled "N600", but that's probably just the
part name in this particular design.

Does anyone have a clue where to find information?
Click to expand...
 
On Sun, 30 Aug 2009 06:58:46 -0400, "Tom Biasi"
<tombiasi@optonline.net> wrote:

How do you know it's a regulator?
Click to expand...
By following the PCB traces, I can see that the power input from the
9.5V AC wall wart goes through a full-bridge rectifier (labeled 17 in
the picture) and then from the "+" pin on the rectifier to one of the
pins on the regulator. When the regulator is in place, the rectifier
gets quite hot quite quickly. After removing the regulator from the
board, the rectifier no longer gets hot.

The web site on which I found the picture:
http://broadcasting.br.funpic.de/dect_inside_gigaset_4000_cl.html
describes it as "Voltage Regulator with 5V".

I just found this forum discussion:
http://www.elektroda.pl/rtvforum/topic361902.html
I don't understand Polish, but a Google translation at least
strengthens the theory that it is a voltage regulator. They refer to
it as 4307dv33, which seems to give a few more sensible and very
promising hits on Google...
 
"H" <not@availab.le> wrote in message
news:9tal95dm3if55n5sumt0qgo266vvc4h43j@4ax.com...
On Sun, 30 Aug 2009 06:58:46 -0400, "Tom Biasi"
tombiasi@optonline.net> wrote:

How do you know it's a regulator?

By following the PCB traces, I can see that the power input from the
9.5V AC wall wart goes through a full-bridge rectifier (labeled 17 in
the picture) and then from the "+" pin on the rectifier to one of the
pins on the regulator. When the regulator is in place, the rectifier
gets quite hot quite quickly. After removing the regulator from the
board, the rectifier no longer gets hot.

Can you see a voltage rating on a capacitor on the + line?
Click to expand...

Tom
 
On Sun, 30 Aug 2009 14:19:48 -0400, "Tom Biasi"
<tombiasi@optonline.net> wrote:

Can you see a voltage rating on a capacitor on the + line?
Click to expand...
There are two large capacitors, both marked:

470
10A
4F8

Would that mean 10V? Capacitors are not normally rated in amps, at
least not on the markings.

I can't quite see where the caps are connected, though, since they sit
completely in contact with the PCB, hiding the traces.

From a new Google search, I found a Russian forum suggesting the
regulator is a TLE 4307 DV33. A further search lead to this:
http://www.datasheetcatalog.org/datasheet/infineon/1-tle4307.pdf

I took a chance that it is indeed an Infineon TLE 4307 DV33, so I
connected 3.3V from a lab supply to where the regulator's output pin
would go. It worked! I got a dial tone and correct communication
between handset and base. The handset did not charge, though.

Some of the traces are difficult to follow, but it seems they take
battery charge power directly off the charge-pump capacitor. That
leaves two possibilities. One is to find out which voltage is normally
on the charge pump, and then use a separate regulator to drive that.
The other, and simplest, option is to find a replacement regulator. My
normal suppliers don't list it. Any ideas where to find one?
 
"H" <not@availab.le> wrote in message
news:jfil95pch5l0rajlujeln63gejtv7i4r4p@4ax.com...
On Sun, 30 Aug 2009 14:19:48 -0400, "Tom Biasi"
tombiasi@optonline.net> wrote:

Can you see a voltage rating on a capacitor on the + line?

There are two large capacitors, both marked:

470
10A
4F8

Would that mean 10V? Capacitors are not normally rated in amps, at
least not on the markings.

I can't quite see where the caps are connected, though, since they sit
completely in contact with the PCB, hiding the traces.

From a new Google search, I found a Russian forum suggesting the
regulator is a TLE 4307 DV33. A further search lead to this:
http://www.datasheetcatalog.org/datasheet/infineon/1-tle4307.pdf

I took a chance that it is indeed an Infineon TLE 4307 DV33, so I
connected 3.3V from a lab supply to where the regulator's output pin
would go. It worked! I got a dial tone and correct communication
between handset and base. The handset did not charge, though.

Some of the traces are difficult to follow, but it seems they take
battery charge power directly off the charge-pump capacitor. That
leaves two possibilities. One is to find out which voltage is normally
on the charge pump, and then use a separate regulator to drive that.
The other, and simplest, option is to find a replacement regulator. My
normal suppliers don't list it. Any ideas where to find one?
Click to expand...
You are doing some good work. The 3.3 may not be the only output for that
regulator. If it were me at this point, I would put in the TLE 4307 DV33.

Tom
 
On Sun, 30 Aug 2009 15:19:25 -0400, "Tom Biasi"
<tombiasi@optonline.net> wrote:

The 3.3 may not be the only output for that
regulator.
Click to expand...
According to the data sheet, it is the only *intended* output. It
seems the designers are "abusing" the charge pump to provide power to
the battery charger.

If it were me at this point, I would put in the TLE 4307 DV33.
Click to expand...
I will. If I can find one. Mouser lists it, but have 16 weeks delivery
and 1200 minimum order. Farnell don't list it. Digikey list it, but
have 2500 minimum order.

Any ideas?
 
"H" <not@availab.le> wrote in message
news:tq2n951k1ojto2tmvkct46n199jk1lqrnd@4ax.com...
On Sun, 30 Aug 2009 15:19:25 -0400, "Tom Biasi"
tombiasi@optonline.net> wrote:

The 3.3 may not be the only output for that
regulator.

According to the data sheet, it is the only *intended* output. It
seems the designers are "abusing" the charge pump to provide power to
the battery charger.

If it were me at this point, I would put in the TLE 4307 DV33.

I will. If I can find one. Mouser lists it, but have 16 weeks delivery
and 1200 minimum order. Farnell don't list it. Digikey list it, but
have 2500 minimum order.

Any ideas?
Click to expand...
See if you can get an "engineering" prototype sample.
 
On Mon, 31 Aug 2009 10:35:49 +0200, H <not@availab.le> wrote:

On Sun, 30 Aug 2009 15:19:25 -0400, "Tom Biasi"
tombiasi@optonline.net> wrote:

The 3.3 may not be the only output for that
regulator.

According to the data sheet, it is the only *intended* output. It
seems the designers are "abusing" the charge pump to provide power to
the battery charger.

If it were me at this point, I would put in the TLE 4307 DV33.

I will. If I can find one. Mouser lists it, but have 16 weeks delivery
and 1200 minimum order. Farnell don't list it. Digikey list it, but
have 2500 minimum order.

Any ideas?
Click to expand...
---
It's an obsolete part, so some of the surplus vultures may have some.
$$$, tho...

Try:

http://www.sierraic.com/pnresults.asp?part=TLE4307&btnsearch=Search

JF
 
3.3v switching reg will be indutor and diode & cap in output line try rs.com
for sub
had 2 of these type devices in lcd tv, output ok for a few second then would
heat up and shut down the ones I had where rated 3amp 5amp ran cool with
replacements not bad for such a small ic
"H" <not@availab.le> wrote in message
news:eek:qkk959g84sakfqn9f96rfoctbdk342vun@4ax.com...
In a Siemens Gigaset cordless phone, a voltage regulator is defective.
The phone is very similar to this picture:

http://broadcasting.br.funpic.de/images/dect_inside_GigaSet4000-Classic_FP_PCB1.jpg

The regulator is the one labeled "10" in the picture.

It says "4307V33" on it, in addition to "AJ431". Here's closeup image
of the regulator. There's a visible logo, but I don't recognize it:

http://home.c2i.net/helgew/temp/4307V33.jpg

If I could find out what voltage should come out of which pin, I could
use any regulator with the same parameters. But I am unable to find
any information at all about it.

There's also this picture:

http://broadcasting.br.funpic.de/images/dect_inside_GigaSet4010-Classic_FP.jpg

, where the regulator is labeled "N600", but that's probably just the
part name in this particular design.

Does anyone have a clue where to find information?
Click to expand...
 
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