TPSM63608: Start Up vs Steady State Behaviour Difference

dharma raj

Prodigy 110 points

Part Number: TPSM63608

Tool/software:

Hi All,

Tried Simulation below circuit & observing different behavior in graph as shown below.

START UP GRAPH:

STEADY STATE GRAPH: Voltage dip observed here but not seen in start-up case. Could anyone clarify it?

Thanks

Dharma

2 months ago

0 Andrew Kutzler 2 months ago

TI__Genius 15380 points

Hi Dharma,

Depending on what your initial conditions are the device needs to have VOUT, CIN, IOUT charge up so that they are in their final states. If they aren't the the device as to reach those conditions before the data is realistic.

I there should be a "start taking data after X time" I'd recommend that for steady state simulation.

Thanks,
Andrew

0 dharma raj 2 months ago in reply to Andrew Kutzler

Prodigy 110 points

Thanks Andrew.

In steady state model i understood the voltage dip is due to missing initial conditions and in Start Up model the voltage dip is not happening due to the presence of initial conditions, am i right?

In Onboard can i expect this dip in voltage?

Thanks

Dharma

Can i expect this

0 Andrew Kutzler 1 month ago in reply to dharma raj

TI__Genius 15380 points

Hi Dharma,

You shouldn't expect that dip in steady state no.

Thanks,
Andrew

Power management

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TPSM63608: Start Up vs Steady State Behaviour Difference