help with identifying cap

[myth77]

i am missing this cap on laptop motherboard...according to boardviewer it is the capacitor with following details but most of the marks i dont understand. So according to boardview:

Part: PC8916 Device: '2580 1A30-0085D00', Outline: 'NBS_C0603_H37_000S'

I understand that the size is C0603, but from this markings i have no idea what is V and UF, manufacturer...please help

[myth77]

Re: help with identifying cap

anybody?

[JaroTech]

Re: help with identifying cap

Hi, it is a 0.1UF/25V.

[myth77]

Re: help with identifying cap

thank you!

[myth77]

Re: help with identifying cap

oh, and can you explain it to me how did you read it? 0.1UF/25V? What markings show what? thank you

[JaroTech]

Re: help with identifying cap

I searched on google NBS_C0603_H37_000S, it referred me to a schematic for the Asus UX31A2, searching the number in the schematic gave me PC6004 0.1UF/25V.

[myth77]

Re: help with identifying cap

yes i did that too before, but if you search on that sheet UX31A2 you will see sometimes NBS_C0603_H37_000S is for 0.1UF/25V sometimes for 1UF/25V, sometimes for 50v..also i found some other sheets and when i search this NBS_C0603_H37_000S its almoust allways the different UF and V. Just use control+f and search and you will see....
So i believe the answer is in this designation 2580 1A30-0085D00, according to the tdk sheet i attached maybe this 1A is 10V, and maybe 30 pf? but i am not sure ...

[JaroTech]

Re: help with identifying cap

You are right, my mistake.

[JaroTech]

Re: help with identifying cap

The capacitor is connected to what?

[myth77]

Re: help with identifying cap

ok, the motherboard is asus gl752vw, i attached the boardview. It is next to the power 19v mosfets.

[JaroTech]

Re: help with identifying cap

What is the number on the chip PU8901?

[myth77]

Re: help with identifying cap

You mean PU8901 or mosfet PQ8901?
I will check the number printed on the chip today late...

[JaroTech]

Re: help with identifying cap

The 32 pins chip (PU8901), the capacitor is connected to the pin 27 of the chip.

[meritosari]

Re: help with identifying cap

hmmm, look like seem 0.047U_0603_25V7M

see datasheet of BQ24780 and sample LA-E361P, good luck

[myth77]

Re: help with identifying cap

i confirm, the U8901 is BQ 24780S chip.
two questions...
1. how did you know that 27pin in this chip is connected to this capacitor? 27 pin is on "p chg lx 30" net and capacitor is on "p chg acmos s 20" an "p chg acmos g 20" net?
2. so, its probably 0.047U_0603_25V7M capacitor? size is 0603, 0.047UF, 25V, what is 7M?

[JaroTech]

Re: help with identifying cap

I confirme what meritosari wrote, the capacitor PC8916 is a 0.047U_0603_25V7M. I was looking at PC8913, not the one you asked. In the BQ24780 schematic, it's the C13, in the sample E361P, it's the PC303.

[myth77]

Re: help with identifying cap

hmmm but on schematic, c13 is 50V?

[JaroTech]

Re: help with identifying cap

The schematic for the BQ24780 is an evaluation module and the input could go up to 24V, too close for a capacitor of 25V. For the Asus, the input is 19V, so they use a capacitor of 25V.

[myth77]

Re: help with identifying cap

The schematic for the BQ24780 is an evaluation module and the input could go up to 24V, too close for a capacitor of 25V. For the Asus, the input is 19V, so they use a capacitor of 25V.

thank you