TPS564247: Design Review

Ashish Kumar Pandey

Prodigy 105 points

Part Number: TPS564247

Hi,

We are using TPS564247 in our design for generation of 2.5V,1.2V and1.8 V from 5V.

Kindly review the schematic(PFA) and provide feedbacks (if any).

Regards,

Ashish Kumar Pandey
Research Engineer
TWDM-PON H/W
CDoT-Delhi

QSB-Texas_Review.pdf

over 2 years ago

0 Zixu Wang over 2 years ago

TI__Expert 8100 points

Hi Ashish,

My colleague will give you response by tomorrow!

BRs

Zixu

0 Edwin Zang over 2 years ago in reply to Zixu Wang

TI__Expert 6425 points

Hi Ashish,

Based on current EN divider resister, when Vin is 5V, all sample are enabled on. it's no problem. but it's marginal. could we set when 4.5V input voltage could enable all sample which means IC begin to work at 4.5V input voltage?

please provide inductance value.

BRs,

Edwin.

0 Ashish Kumar Pandey over 2 years ago in reply to Edwin Zang

Prodigy 105 points

Hi Edwin,

Thanks for the review.

We have provided the I/P range from 4.5 V to 5.5 V in our calculations. Attached are the WebBench designs for your reference.

We have used same inductor(PFA datasheet) for L9,L12,L13

Regards,

Ashish

/cfs-file/__key/communityserver-discussions-components-files/196/SRU1028_2D00_1R0Y.pdf

/cfs-file/__key/communityserver-discussions-components-files/196/3000.WBDesign8.pdf

/cfs-file/__key/communityserver-discussions-components-files/196/4331.WBDesign7.pdf

/cfs-file/__key/communityserver-discussions-components-files/196/0842.WBDesign6.pdf

0 Zixu Wang over 2 years ago in reply to Ashish Kumar Pandey

TI__Expert 8100 points

Hi Ashish,

My colleague Edwin will give you reply by tomorrow!

BRs

Zixu

+1 Edwin Zang over 2 years ago in reply to Ashish Kumar Pandey

TI__Expert 6425 points

Hi Ashish,

Got it. Inductance is no problem. It's suggested to change EN down divider resister to 86k ohm. so all parts can be enabled on at 4.5V input voltage.

BRs,

Edwin.

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TPS564247: Design Review