What are these black rectangular SMD elements
What are these black rectangular SMD elements and what is the resistance of the resistors between them, thanks
969042
1个答案
已选择的解决方案
声誉积分: 4.5千
14
5
4
Maybe you can find some info based on these close-up images of the area
这个答案有帮助吗？
得分
0
That a better image than what I had found👍 I was looking for DA9081
So it's a Dialog DA9091 it looks like this chip might be the root issue as you can see in this dialog DA9091 on Raspberry Pi's site and here Renesas 9091 support. Here's a source for the chip DA9091 and it appears the chip can burn when subjected to the wrong voltage.
Still looking for the chip sheet and maybe a sample circuit.
The inductors you highlighted are the following spec
Inductor, SMT 0805, 470nH, IRMS=4A, ISAT=4.6A, DCR(max)=35mR
1条评论
Sadly the schematics and the full board view drawings have not been released to be sure. Here's a useful site to help you a bit: raspberrypicase
由 DanJ 完成的