UCD90160A: Power down sequencing after a short interruption of power

John Garrett

Part Number: UCD90160A

Hi All,

I have a customer who is trying to sequence an Altera Cyclone 10, with a UCD90160A. The Cyclone 10 has definite power up and down requirements. A big concern is guaranteeing that the power down sequence will complete in the case of a short interruption of power. In this scenario the board is assumed to be fully functioning, after which there is a short power interruption. The customer wants to complete the power down sequence before ramping up the Cyclone again. I'm in the process of getting more specific details on the timing but I cannot see how to do this in the Fusion Digital Power Designer. Are there some examples available for this, or other documentation that might help?

Please let me know.

Thanks & regards, John Garrett, TI-AFA

over 6 years ago

0 yihe over 6 years ago

TI__Guru 66240 points

Hi John
Will UCD have its own power during the short interruption of power?
Please refer section 4.7-4.11 of www.ti.com/.../slua815a.pdf
Regards
yihe

0 John Garrett over 6 years ago in reply to yihe

TI__Expert 4220 points

Thanks for the quick response. I've referred the customer to the UCD90xxx FAQ Application Report and am waiting on his response.
And yes the UCD90160A will be powered during the power interrupt via a large hold-up capacitor.
Thanks again, John Garrett, TI-AFA

0 John Garrett over 6 years ago in reply to John Garrett

TI__Expert 4220 points

More help is needed on this issue as the customer continues to have problems getting the power down sequencing to work at all. Please contact me on this asap as I'd like to set up a customer call.

Thanks, John Garrett, TI-AFA

0 Qian Chen over 6 years ago in reply to John Garrett

TI__Mastermind 24075 points

Hi John,

We will contact you by email.

Thanks
Qian

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UCD90160A: Power down sequencing after a short interruption of power