need CA6F4R ic Packard Bell

[geordie]

Hi
I have a Packard Bell Laptop: Easynote R0422 and need to replace the
above IC.
Can anyone supply from gash motherboard or tell me of supplier.
No info on Web.

For info. the unit works ok from battery. Mains adaptor charges
Battery but instead of supplying 12V to VCORE , the full 19V passes
through this IC and and the Vcore Voltage packs up in about 10 secs.
Just time to see the Logo.

Many Thanks

T marshall

 

[Franc Zabkar]

On Sun, 28 Dec 2008 10:39:29 -0800 (PST), geordie
<tommy-krihc@tiscali.co.uk> put finger to keyboard and composed:

Hi
I have a Packard Bell Laptop: Easynote R0422 and need to replace the
above IC.
Can anyone supply from gash motherboard or tell me of supplier.
No info on Web.

For info. the unit works ok from battery. Mains adaptor charges
Battery but instead of supplying 12V to VCORE , the full 19V passes
through this IC and and the Vcore Voltage packs up in about 10 secs.
Just time to see the Logo.

Many Thanks

T marshall

Could this be a MOSFET? Is it the chopper in a switchmode regulator?
Is it a switchmode regulator with an integrated chopper?

How many pins? Package style? Which pins are the power pins?

Can you upload a photo of the PCB to your web space?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Tue, 30 Dec 2008 01:05:04 -0800 (PST), geordie
<tommy-krihc@tiscali.co.uk> put finger to keyboard and composed:

info. 8 pin soic package. pins1,2,3 are connected together,19V input
pin4 control 3.1V
pins 5,6,7,8 connected together output 19V (should be 12V.

That looks like a MOSFET.

Pins 1,2,3 are the Source, pins 5,6,7,8 are the Drain, and pin 4 is
the Gate.

Here is an example (but not your part):
http://www.irf.com/product-info/datasheets/data/irf7842pbf.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Franc Zabkar]

On Tue, 30 Dec 2008 20:30:26 +1100, Franc Zabkar
<fzabkar@iinternode.on.net> put finger to keyboard and composed:

On Tue, 30 Dec 2008 01:05:04 -0800 (PST), geordie
tommy-krihc@tiscali.co.uk> put finger to keyboard and composed:

info. 8 pin soic package. pins1,2,3 are connected together,19V input
pin4 control 3.1V
pins 5,6,7,8 connected together output 19V (should be 12V.

That looks like a MOSFET.

I should have added that a logo might have helped identify the part.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[geordie]

On Dec 28, 8:57 pm, Franc Zabkar <fzab...@iinternode.on.net> wrote:

On Sun, 28 Dec 2008 10:39:29 -0800 (PST), geordie
tommy-kr...@tiscali.co.uk> put finger to keyboard and composed:

Hi
I have a Packard Bell Laptop: Easynote R0422 and need to replace the
above IC.
Can anyone  supply from gash motherboard or tell me of supplier.
No info on Web.

For info. the unit works ok from battery. Mains adaptor charges
Battery but instead of supplying 12V to VCORE , the full 19V passes
through this IC and and the Vcore Voltage packs up in about 10 secs.
Just time to see the Logo.

Many Thanks

T marshall

Could this be a MOSFET? Is it the chopper in a switchmode regulator?
Is it a switchmode regulator with an integrated chopper?

How many pins? Package style? Which pins are the power pins?

Can you upload a photo of the PCB to your web space?

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Thanks Franc for reply.
info. 8 pin soic package. pins1,2,3 are connected together,19V input
pin4 control 3.1V
pins 5,6,7,8 connected together output 19V (should be 12V.

there is another CA6F4R in the Charger circuit with 19V input,
outputting 12V.

All a bit academic now, as I have accidently shorted another chip and
nothing works now.
Will have to look for replacement motherboard

 

[Franc Zabkar]

On Tue, 30 Dec 2008 20:35:01 +1100, Franc Zabkar
<fzabkar@iinternode.on.net> put finger to keyboard and composed:

On Tue, 30 Dec 2008 20:30:26 +1100, Franc Zabkar
fzabkar@iinternode.on.net> put finger to keyboard and composed:

On Tue, 30 Dec 2008 01:05:04 -0800 (PST), geordie
tommy-krihc@tiscali.co.uk> put finger to keyboard and composed:

info. 8 pin soic package. pins1,2,3 are connected together,19V input
pin4 control 3.1V
pins 5,6,7,8 connected together output 19V (should be 12V.

That looks like a MOSFET.

I should have added that a logo might have helped identify the part.

Just in case someone comes across this thread in future, the OP
contacted me via email and provided me with a photo of the part.

The logo belongs to Alpha & Omega Semiconductor, Inc.

The IC was marked as follows:

LOGO 4407
CA6F4R

The part is an AO4407 P-Channel Enhancement Mode Field Effect
Transistor:
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-4/DSA-62635.pdf

It is rated at 30V, 12A.

As strange as it may seem, "CA6F4R" is a date and batch code. At first
glance it would appear that 4407 is a WWYY date code, but that is not
the case.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.