Dual output using TPS54383

mahind s

Prodigy 25 points

Other Parts Discussed in Thread: TPS54383

I need a dual output with Vo1=10.5V/2A & vo2=5.12V/2A. with input of 12V.

i tried changing the feedback network in the application circuit given in datasheet(fig.44, pg-37).

where i gave Vin=12V input & i could not achieve the output what i expect.

someone please help me, is it possible to get the expected Vo1 & Vo2 if the input Vin=12V.

Thanks in advance.

over 9 years ago

0 JohnTucker over 9 years ago

TI__Guru**** 191445 points

TPS54383 should be able to output 10.5 V from 12 V input. the required duty cycle is 87.5% close to the maximum of 90%. What output do you get?

0 JohnTucker over 9 years ago in reply to JohnTucker

TI__Guru**** 191445 points

I should also add that you may need to use different LC output filter components than those show. I recommend that you work thru the complete design equations for your particular requirements.

0 mahind s over 9 years ago in reply to JohnTucker

Prodigy 25 points

Thanks John.
I got 3V & 1.9V output, when input was 12V.
I didn't consider the duty cycle equation, i will carry on with that.
will update the status as soon i rectify the changes.
Thanks again.

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Dual output using TPS54383