TPS23753: EVM circuit discussion

Alvin Jener

Prodigy 30 points

Part Number: TPS23753
Other Parts Discussed in Thread: PMP8803

Hi,

I have two schematic of EVMs, and I found some circuit are difference between both EVMs.EVM_circuit.docx

See the picture as attached.

What's the difference of test result between both circuit architecture?

Thanks!

Alvin

over 7 years ago

0 Thomas Amlee over 7 years ago

TI__Genius 9230 points

Hi Alvin,

The difference between a high side & low side rectifier will likely be the conducted emissions. I will look into this to see if I can find a more detailed answer.

Thanks,
Tom A.

0 Thomas Amlee over 7 years ago in reply to Thomas Amlee

TI__Genius 9230 points

Hey Alvin,

Here are the test reports for PMP8803 & PMP4648

- Tom

PMP4648_RevC_Test Report.pdf

PMP8803_RevA_Test_Report.pdf

0 Alvin Jener over 7 years ago in reply to Thomas Amlee

Prodigy 30 points

Hi Tom,
Thanks for your information.
It seems almost the same output ripple and Loop Frequency Responses in both circuits.
So we can design one of the two circuits?
You also mentioned that will related to conducted emissions, does it impact normal function?

Regards,
Alvin

0 Thomas Amlee over 7 years ago in reply to Alvin Jener

TI__Genius 9230 points

Hi Alvin,

You can certainly design with either.

Conducted emissions (noise from the DC/DC converter) will not impact normal function. It's just something to keep in mind when trying to pass conducted emissions standards.

Thanks,
Tom A.

0 Alvin Jener over 7 years ago in reply to Thomas Amlee

Prodigy 30 points

Hi Tom,
Okay understood!
Thanks!

Sincerely,
Alvin

Power management

Power management forum

TPS23753: EVM circuit discussion