Hi,
在新产品中，我们使用具有IMX6ULL的DA9061-66。该产品结束，我们已经发布了市场。
Generally everything works fine (passed all EMI tests with above the norm levels without problems, no problems during our development phase) but unfortunately in our long time tests we experience problems. After ~1-21 days on some of our devices we see that the DA9061 shuts off the Buck3 regulator which supplies our DDR3 RAM (we use one 16-Bit DDR3 IC). This leads to a freezing device from which there is no other way out than turning the power off and on again. So market launch is stopped until we resolve the problem.
目前我们不知道它会发生原因。
Here is what we already tried:
——我们没有电报I2C的监控which shut off the regulator when the device has a failure.
- On a device in failure mode, we read out the registers of the DA9061 with the development board, I will attach the file to this post as .pdf file, but it is a .txt file. We found nothing unusual. Buck3 is enabled. Maybe we overlooked something.
- On this failing device we monitored the current on the Buck 3 rail and there was no overcurrent event.
- 冻结设备上DA9061的VREF为1,19V
- Vcore of the DA9061 was 2.5V
- Only disconnecting the power seems to get the DA9061 back to normal work
- It seems totally random when it happens. On one device it happened after 30 minutes, next run after 20 days. Same software, same environment and so on
- 我们试图用不同的方法强制错误，但直到现在，我们没有找到一种重现方法的方法。它只发生完全随机，但似乎它始终在同一设备上发生。
- Our system logs (we use Linux) don't show anything. The system just stops without any error message probably when the RAM voltage fails. Until now we didn't get a trigger to the falling voltage, we are still trying to. Its a bit of a problem with the long time between the error occurence.
At the moment the most plausible explanation to us is that the DA9061 chips on this devices are somehow damaged.
We already submitted schematics and layout to Dialog but got no feedback to them now for 24 days, which is very disappointing to me.
Has anyone here ever had a comparable thing with this PMIC or this PMIC family? We are at a dead end here as it seems.
Thank you very much,
最好的祝福，
Torben
你好Torben，
I will reach out directly to you.
Kind regards,
Elliott
Hi Elliott,
looking forward to it.
你好Torben，
we are in a very similar situation as you are. We are using a DA9063 device in a product that will be released in a few weeks.
In some products the DA9063 devices now show the same behavior as you already described - they suddenly shut-off the BUCK-Peri DCDC after it has been running normally for several days.
Our investigations results are as follows:
- The DA9063 internal logic/sequencer seems to be still running as nRESET pin and other voltages remain active while BUCK_PERI is turned off
- 关闭降压-Ceri DCDC（一个思想）时与DA9063的I2C通信（一个想法，调节器通过I2C关闭）
- We connected an I2C sniffer to the devices that had switched off the BUCK_PERI regulator to read out the status and control registers:
- After a powercycle BUCK-Peri is working correctly again
Until now we have not been able to force the failure.
- 我们将不同的负载和过载应用于DCDC（包括突然的负载步骤）
- We applied external voltages to the device (below and above the DCDC output voltage)
To answer your question Torben, yes we see the almost exact same behavior as you described with a device of the same family. And we are running out of ideas for the further investigation.
@Eliot: I would appriciate very much if we could get in contact and work on a solution toghether. This is a very serious issue for as as we are very close to the release of our product.
Thank you very much for your help.
Best regards
弗洛里安
嗨弗洛里安，
that sounds very much like a comparable problem, except we do not measure any voltage left on the disabled regulator, this seems different.
We are still working on the problem here. No luck forcing the error until now here either.
Best regards
Torben
Hello Florian,
I will reach out directly to you.
Kind regards,
Elliott