TMS320C5517: Power off and on frequently.

Sugawara-san

Hard to say. I don't think this can be assumed as an intended use-case for the device - so if they want to do something like this, they need to ensure power up and power down sequences are followed per datasheet every power cycle.

Do you have any idea on the total power cycles they are assuming,  life time of the product,  how many times a day going through the power on power off etc?

Regards

Mukul 

Hi Mukul,

I have been checking about the power cycles. 
Will share the info. soon.

According to the datasheet, it says as follows:
Datasheet 5.7.2.2 Power-Supply Sequencing
The device does not require a specific power-up sequence. However, if the DSP_LDO is disabled
(DSP_LDO_EN = high) and an external regulator supplies power to the CPU Core (CVDD), the external
reset signal (RESET) must be held asserted until all of the supply voltages reach their valid operating ranges.

Note: the external reset signal on the RESET pin must be held low until all of the power supplies reach
their operating voltage conditions.

Could you please let me clarify the power up and down sequence?

Thank you for your time to check.
Best regards,
Hitoshi

Hi Mukul,

This is the additional information as follows:

1) Power cycle:  Once a five minutes.  12 times / hour.
2) Life : 13 years.

I would appreciate if you could advise the safer resolution for the request.
Thank you.

Best regards,
Hitoshi

Hi Sugawara-san

This looks like a tough use-case - I will see if I can find some additional guidance from the quality/reliability team on this. 

Is the application/product working 24/7 - 288 power up/down a day? 

I did not understand your previous query/post - even if such a scenario is possible, customer will need to strictly follow the recommendations on power up/down sequence per the  datasheet.

Regards

Mukul 

Hi Mukul,

I am afraid that I was not able to find the power up/down sequence in the datasheet.
It says that the device does not require a specific power-up sequence.
Could you please check it and let me know?
I would like to introduce the power up/down sequence to the customer.

Yes, your are correct.
12 power up  and down a hour so it means 288 power up and down a day.

Thank you for your kind support.
Best regards,
Hitoshi 

Hi Mukul,

Thank you so much for your kind observation.
Will advise the customer accordingly and ask to evaluate carefully there is no issue under their use case.

Best regards,
Hitoshi