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Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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What is this chips part number

I need to know what this chip is, it was water damaged on my board, and the pads wont take any solder, so i need a new one, but i can't read the name of the chip anymore. Any one know the name of the chip?

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jeremy, what are the last 3 digits of your serial number? This will help me to properly identify your computer and thus the motherboard. Or better yet, since you already have it apart, what is the number off your logic board?


I don't think that that is the chip im looking for, the chip is padded, and needs solder balls for attachment. that one has leads that go out to the side.


Like I said, to be 100% sure, what are the last three digits of your serial number? this will help to identify your computer properly? Or the numbers on your motherboard will help a lot too. If you look at the data sheet, the LP8543 is a BGA. Are you saying yours has 6 leads to solder?


No the chip is a 4x4 grid on the underside of the chip. im not at home right now but when i am i will put the serial number up.


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jeremy, right now, with the limited information I have about your logic board, it appears that the IC is REFERENCE DES U9701 PROD DESCRIPTION IC,LP8543,WHT LED BKLT CTRLR,QFN24. The LP8543 is a white LED driver with integrated boost converter. It has 7 adjustable current sinks which can be controlled by SMBus or I 2C-compatible serial interface, PWM input and Ambient Light Sensor (ALS). That datasheet for that is available right here. they are a little hard to come by as a single piece. You can purchase quantity of 10 from here. There are some on sale right here as well as If there is any change after you positively identify the motherboard for me, I will let you know as soon as possible. Hope this helps, good luck.

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