TPS53915: Change switching frequency in TINA simulation

John Plasterer

Part Number: TPS53915
Other Parts Discussed in Thread: TPS53515

I have downloaded the TINA model for the TPS53915 but there does not seem to be a way to change the switching frequency of the regulator. THe model seems to switch at around 1MHz which isn't the default of 400kHz. Is there a way to change the switching frequency in the model?

Thanks,

over 3 years ago

0 JohnTucker over 3 years ago

TI__Guru**** 191445 points

JP,

There is more than one TINA model. which are you having issues with?

0 John Plasterer over 3 years ago in reply to JohnTucker

Prodigy 30 points

I downloaded SLUM556.TSC from the TPS53915 webpage.

Thanks,

0 JohnTucker over 3 years ago in reply to John Plasterer

TI__Guru**** 191445 points

JP,

I verified that it does indeed switch at 1 MHz. At first glance, here does not appear to be a way to change it. We are reaching out to someone who may have more details. Due to the present circumstances, it may take some time. Please be patient.

0 JohnTucker over 3 years ago in reply to JohnTucker

TI__Guru**** 191445 points

JP,

The core model for this is the same as the analog version TPS53515. For the TPS53515 the frequency is changed using a FB divider from VREG5 to the ADDR pin to GND, In SLUM556 that divider is R3 and R4. You can change the frequency based on this table:

FSW	ADDR Pin Voltage
1 MHz	2.48 V
850 kHz	2.063 V
750 kHz	1.625 V
600 kHz	1.28 V
500 kHz	0.935 V
400 kHz	0.590 V
300 kHz	0.310 V
250 kHz	0.065 V

We will attempt to get the model updated.

0 John Plasterer over 3 years ago in reply to JohnTucker

Prodigy 30 points

Thanks! That worked.

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TPS53915: Change switching frequency in TINA simulation