Re: What is this chip? Voltage regulator?
- From: Franc Zabkar <fzabkar@xxxxxxxxxxxxxxxxx>
- Date: Sun, 19 Feb 2006 09:49:03 +1100
On Sat, 18 Feb 2006 11:25:08 -0000, "carl0s"
<carl@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> put finger to keyboard and
composed:
"Franc Zabkar" <fzabkar@xxxxxxxxxxxxxxxxx> wrote in message
news:deo9v1tj6u8jcjr04o6mtvkkjo27dk26g9@xxxxxxxxxx
On Thu, 16 Feb 2006 10:34:16 -0000, "carl0s"
<carl@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> put finger to keyboard and
composed:
I wonder if somebody could please tell me what this IC does, ...
Here's a picture:
http://www.uk2sucks.net/ic.JPG
Siliconix Si4435 P-Channel 30-V (D-S) MOSFET:
http://www.vishay.com/docs/70149/70149.pdf
http://www.vishay.com/doc?72123
Thanks everybody, your help is very much appreciated. Thanks for the eBay
pointer. I have just purchased a replacement board for £43 including
delivery. Out of interest, is this MOSFET for the USB port then or something
else?
AFAICT, you have two SMPS circuits in the photo. One uses a low power
MOSFET (Si4435), the other uses a higher power MOSFET (SUD50N03-10).
If I'm right, then there should be two PWM controller ICs nearby. You
can determine the output voltage of each circuit by inspecting the
values of the resistors around the PWM controller IC's error amp pins.
A USB port requires +5V, while the mainboard may run on 3.3V. If you
need more assistance in this area, then a larger photo might help.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
.
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- What is this chip? Voltage regulator?
- From: carl0s
- Re: What is this chip? Voltage regulator?
- From: Franc Zabkar
- Re: What is this chip? Voltage regulator?
- From: carl0s
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