EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: zabounis on November 15, 2022, 05:49:04 pm
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Hi, this is from an HP Probook x360 440 G1 motherboard (L28241-601).
As you can see on the picture, i'm trying to source the specific blown chip. I cannot read whatever is printed on the chip. The only digits visible are: "08" FM. Does anybody have a slight idea what is this chip or an alternative one. Seems like a driver for the above mosfets.
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Are you saying that this single chip drives both MOSFETs?
ISL95808HRZ-T, Renesas, High Voltage Synchronous Rectified Buck Dual MOSFET Driver, marking 08, DFN-8:
https://www.renesas.com/us/en/document/dst/isl95808-datasheet (https://www.renesas.com/us/en/document/dst/isl95808-datasheet)
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Ι assume yes. There is no other ic driver chip around them, and it is exactly above them. Also i can see a trace from the second mosfet's gate going directly to one of this chip's legs. The other gate of the mosfet dissapears in a via. I will check with the multimeter to see if it also ends up to this chip.
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See my edit.
https://ae01.alicdn.com/kf/Hdbd6f0579c334d10af413404c50f1d5c1/Nuevo-ISL95808HRZ-T-ISL95808HRZ-ISL95808H-imprimir-08-808-QFN8-de-alta-calidad-en-stock.jpg (https://ae01.alicdn.com/kf/Hdbd6f0579c334d10af413404c50f1d5c1/Nuevo-ISL95808HRZ-T-ISL95808HRZ-ISL95808H-imprimir-08-808-QFN8-de-alta-calidad-en-stock.jpg) (photo)
https://www.mainlaptop.vn/forum/uploads/2021/09/Vegas-Turis_MLK_KBL-R_-_17841-1.pdf (https://www.mainlaptop.vn/forum/uploads/2021/09/Vegas-Turis_MLK_KBL-R_-_17841-1.pdf) (schematics for different mainboard - see page 40)
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Cheers mate!!!
It seems like this one. i checked that Pin 1 and Pin 5 are the gate driver pins and yes this little guy is driving both mosfets.