Other Parts Discussed in Thread: TPS25940-Q1
Dears,
Please help to analyze the cause of FLT trigger, thank you!
In A SSD server machine frame, there’s a normal working disc A, when we were in the other slot insert disc B (Both disc A and disc B use the SSD of TPS25942L, they are the same products), would likely trigger TPS25942L FLT alarm in the working disc A.
At first we doubt that it may cause the machine box power glitch when we inserted into the disc B, leading to A TPS25942L FLT alarm. After much monitoring, we find that the 12v power supply is normal before the FLT alarm, there is no overvoltage and under voltage phenomenon.
The following bigger graph:
the green line: PLT
blue line: 12V power input
yellow line: NC
So we try the TPS25942L EVM kit.
We do these actions, connected to power development board in the front of SSD (it is the 12v power supply -> TPS25942L EVM - > SSD card).
It is a pity that the problem is still, the TPS25942L EVM still appear FLT alarm.
This may rule out our board design and layout is quite ok.
The following smaller figure, red-PLT, green-12 v power supply, yellow- SSD board FLT.
Please help to analyze the cause of FLT trigger, thank you!
