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Dear Team,
At present, when using LM25066, it is found that the SMBA signal is low, but the power supply works normally, the voltage is normal, and PG is high.
The specifications are as follows:
The D8h value I read is 0x0800, which I think is OK;
By writing the 03h register, then the SMBA signal is high.
1. What does ARA mean? what's the effect? I can't understand the description in the specification;
2. During normal use, how to avoid the situation that SMBA is low? How to prevent SMBA signal from being affected by ARA?
Read the values of several registers, which are somewhat abnormal as follows:
79h value is 0x7802, bit[14] is abnormal;
7ch value is 0x04, bit[2] is abnormal.
Will these registers affect the SMBA signal? Or will it affect the value of the D8h register?
At present, it is started with no load. If you need related lines or other information, please let me know.
Many Thanks,
Jimmy
Hi Jimmy,
Please send CLEAR_FAULTS command after every successful start-up.
Please click on "This resolved my issue" if this post answers your query.
Hi Pal,
Thanks for your great support.
Can you tell me the detailed reason?
The signal I tested on another project is normal, but our hardware does not require the software to perform the CLEAR_FAULTS operation. We will confirm this with the software again.
Another project some register reading values are as follows:
8Dh-->0x0800
79h-->0x0000
7Ch-->0x00
Many Thanks,
Jimmy
Hi Jimmy,
If any bit is set at STATUS_WORD (79h) register SMBA\ is asserted. To make it de-asserted, the underlying fault need to be removed and CLEAR_FAULTS command needs to be sent.