TPS54425: TPS54429 / TPS54425 don't work 5V output on TINA TI

michihiro akashi

Part Number: TPS54425

Hello teams

But it's output ramp up only til 4V on our design.
And Both Vout level is decreasing gradually until around 3.5V.
As you can see in our schematic,
it's behavior would happen with noload situation.

Why their output do not reach to 5V even if feedback resistances are set to 5Vout?

Our designs reffered example design of TI.
It's url is bellow.

TPS54429
https://www.ti.com/jp/lit/tsc/slvm375

TPS54425
https://www.ti.com/jp/lit/tsc/slim294

slim294.tsc slvm375.tsc

best regards,

akashi

over 1 year ago

0 michihiro akashi over 1 year ago

Prodigy 180 points

Hello teams
sory I forget to add below sentence at the top.

"We want to check the behavior of TPS54429/TPS54425 with 12vin/5vout setting on TINA TI."

best regards,

akashi

0 Daniel Li14 over 1 year ago in reply to michihiro akashi

TI__Mastermind 27470 points

Hi Akashi:

we will reply to you next week as China holiday. It is no problem for device output 5V. Only thing you want to check is Tina model behavior, right?

thanks

+1 Daniel Li14 over 1 year ago in reply to Daniel Li14

TI__Mastermind 27470 points

Hi Akashi:

see TPS54429 result, I also attached modified simulation files, pls try it. you may need take care of the load resistor to make sure it is not over loaded

slvm375_TPS54429.TSC

thanks

Power management

Power management forum

TPS54425: TPS54429 / TPS54425 don't work 5V output on TINA TI