ASUS GL504GM - no 3.3/5V, bad charger ic

[ktmmotocross]

Hello. Have this ASUS GL504GM, that have bad charger ic and give 19V to battery. after change battery voltage goes fine, have VIN, but no 3.3/5V. I dont have schematic an there is so many coils tht i cannot find coils fot it. I found ine IC that can be 3.3/5V ic but dont find its datasheet.

can somebody found me what ic it is?

mark on ic is KA=4A G2H

[mon2]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

RT6226A

See attached.

[Sephir0th]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

Probably not, what you are looking for. Usually It isn't that hard to find the right Controller or Maybe two of them in Case of Silergy solution (for example). And you're experienced Afaik.

Clear pictures of both Sides of the MB?

[mon2]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

The charger ic is marked with KA=4A.

This is Richtek RT6226A. See the markings legend on the first page of the posted datasheet.

[SMDFlea]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

The charger ic is marked with KA=4A.

This is Richtek RT6226A. See the markings legend on the first page of the posted datasheet.

Some richtek parts can have the same marking code but in a different package and pin count (as sepiroth said) , or even a different package with the same number of pins.

KA= RT6226AGQUF UQFN-12HL 3x3 https://cdn.badcaps-static.com/pdfs/...8f87b97082.pdf

KA= RT8819AGQW WQFN-24 4X4 (GL502VM boardview)

.

[Sephir0th]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

In my opinion this is neither a Charging IC nor 3V/5V Controller.

EDIT: So the wrong Datasheet was shared before. Didn't checked that. This explains a lot

[ktmmotocross]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

Here is photo.

[SMDFlea]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

Make a list of all the QFN IC`s ,on the other side of the board too ,then google each part number,find the datasheets. Take some pictures of the board nd mark the IC`s .

[ktmmotocross]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

Yes, that ic was not 5/3.3 ic. i found TI51285A, but it dont get EN signals. REG signals is ok. looks like SIO it8225 make it. have anybody some schematic with this IC to compare it?

[SMDFlea]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

Yes, that ic was not 5/3.3 ic. i found TI51285A, but it dont get EN signals. REG signals is ok. looks like SIO it8225 make it. have anybody some schematic with this IC to compare it?

https://www.badcaps.net/forum/showthread.php?p=1042958

[ktmmotocross]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

it is BGA ic so i cannot find pin trace to measure it. but i have 0.0V no short on SDA and SCL pins of charger ic bq24780s

[jasko_jacker]

Re: ASUS GL504GM - no 3.3/5V, bad charger ic

This is used on an asus gl704gm and gl504 also with KA-5G marking and is used to provide voltage to GPU or VRAM.
Datasheet not available on the Richtek marking pdf there is a KA but the pins not match