i.MX ProcessorsのトピックRe: How to defined a ripple range and absolute maximum voltage?

How to defined a ripple range and absolute maximum voltage?

t-iishii — Mon, 28 Nov 2016 11:24:51 GMT

I have some question about definition of ripple range.

It is defined 5% Vp-p of supply voltage average value in Hardware Development Guide.

If VDD_ARM_CAP average value is 1.27V, ripple spec allowed 1.238V( = 1.27x0.975) ~ 1.301V( = 1.27x1.025).

Is it correct?

If so,

Absolute maximum voltages of VDD_ARM_CAP is defined to 1.3V in Datasheet.

Is it OK that average value is 1.27V of VDD_ARM_CAP because average value is less than 1.3V?

Or is it NG because top of ripple voltage is over a 1.3V?

Best regards,

Ishii.

Re: How to defined a ripple range and absolute maximum voltage?

igorpadykov — Mon, 28 Nov 2016 23:49:22 GMT

Hi Ishii

1.27V+-0.0635V (allowed 5%) should be within allowed by datasheet range.

Best regards
igor
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Re: How to defined a ripple range and absolute maximum voltage?

t-iishii — Tue, 29 Nov 2016 00:44:46 GMT

Dear igor

Thank you for your quick reply.

How about Absolute Maximum Ratings.

Is it applies an average value (i.e. 1.27V)?

Or average value + ripple (1.27V + 0.0653)?

Best regards,

Ishii.

Re: How to defined a ripple range and absolute maximum voltage?

igorpadykov — Tue, 29 Nov 2016 00:49:02 GMT

Hi Ishii

average value + ripple

Best regards
igor

Re: How to defined a ripple range and absolute maximum voltage?

t-iishii — Tue, 29 Nov 2016 00:56:10 GMT

Dear igor

Thank you for your quick response.

I understand a spec definition of datasheet.

Best regards,

Ishii.