LP8868Y-Q1: TPS923655EVM replace to LP8868Y to test customer's requirement

Ann_Lien

Part Number: LP8868Y-Q1

Tool/software:

Hello expert,

I would like to use TPS923655EVM to replace with LP8868Y on this board. I will change the IC and exchange pin13/14 for CSP/CSN. But I would like to double check below points.

if we don't have LED board, could we use Eload to simulate LED board? I tried on CV mode but the voltage cannot regulated on set voltage.
do you have test waveform on Vout/Vin on EVM board to let us know which waveform is normal which is abnormal?

Best regards,

Ann Lien

over 1 year ago

0 Ann_Lien over 1 year ago

TI__Genius 14760 points

sorry for the TYPO, I will exchange pin12/13. Thanks!

0 Ann_Lien over 1 year ago in reply to Ann_Lien

TI__Genius 14760 points

Hello expert,

May we have your help on this case? Thanks a lot!

Best regards,

Ann Lien

0 Steven Li over 1 year ago in reply to Ann_Lien

TI__Mastermind 23350 points

Hi Ann,

Our expert is currently out of office. He will reply to you later. Thanks for your understanding.

Best Regards,

Steven

0 Ann_Lien over 1 year ago in reply to Steven Li

TI__Genius 14760 points

Hello Steven,

Thanks for reply! But my customer needs to provide prototype to their customer shortly and I want to duplicate this situation on my board now. May we know if you or other team member could help on this case? Thanks a lot!

Best regards,

Ann Lien

0 Steven Li over 1 year ago in reply to Ann_Lien

TI__Mastermind 23350 points

Hi Ann,

I have talked with our expert. He will be back to the office tomorrow and will then reply to you.

Best Regards,

Steven

0 Zhiqian Wu over 1 year ago in reply to Ann_Lien

TI__Mastermind 32645 points

Hi, Ann

We have talked in the webex, pls let me know if you have any feedback or update.

0 Ann_Lien over 1 year ago in reply to Zhiqian Wu

TI__Genius 14760 points

Hello Zhiqian,

For the CV mode on eload, could we connect directly from Vin to Vout to simulate LED string? If yes, we are using 4 series LED and should we set to 12.6V for CV mode? Thanks a lot!

Best regards,

Ann Lien

0 Zhiqian Wu over 1 year ago in reply to Ann_Lien

TI__Mastermind 32645 points

HI, Ann

As talked in the phone pls confirm the device worked normally first.

Power management

Power management forum

LP8868Y-Q1: TPS923655EVM replace to LP8868Y to test customer's requirement