TPS2493: PSpice for Ti - Wrong PG polarity

Paul R

Part Number: TPS2493
Other Parts Discussed in Thread: BQ25730, TPS1663, TPS25982,

Hello,

Further to this 2 year old post: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/777227/tina-spice-tps2492-have-you-corrected-the-tps2492-broken-model-yet?tisearch=e2e-sitesearch&keymatch=TPS2493#

I believe a similar mistake has been made somewhere. If you simulate this part in PSpice for Ti (in a very simple configuration) you will find the PG polarity is opposite to that described in the datasheet:

(please note upward edge on teal trace in lower right)

This is mirrored in fault conditions, with ~PG going low approximately 9ms after fault goes low.

i will test this on an actual chip but am concerned about this discrepancy.

Thanks,

Paul

over 4 years ago

0 Rakesh over 4 years ago

TI__Guru** 106161 points

Hi Paul,

Sorry for the inconvenience.

Let me check and get back with status update by Monday.

Can you please share your system specs to make sure that you picked the right device.

Best regards, Rakesh

0 Paul R over 4 years ago in reply to Rakesh

Prodigy 20 points

Hi Rakesh,

10-26VDC, approx 100W inrush limit. This is sequencing a BQ25730 downstream of it.

Thanks.

0 Rakesh over 4 years ago in reply to Paul R

TI__Guru** 106161 points

Hi Paul,

Thanks for the details.

Can you check whether TPS1663 or TPS25982 fits for your requirement.

We can parallel two TPS1663 devices in parallel for higher current support. Please refer the thread for more details https://e2e.ti.com/support/power-management/f/196/p/955040/3530866#3530866

Best regards, Rakesh

0 Paul R over 4 years ago in reply to Rakesh

Prodigy 20 points

Hi Rakesh,

Both would be suitable for basic use case, but not for our extended use which is 35-68VDC in, 25A out, FET not selected yet. Is the TPS2493 NRND?

Paul

0 Rakesh over 4 years ago in reply to Paul R

TI__Guru** 106161 points

Hi Paul,

TPS2493 is not going to be NRND. I just recommend other better options interms of solution size and performance.

+1 Rakesh over 4 years ago in reply to Rakesh

TI__Guru** 106161 points

Hi Paul,

Please use TINA simulation file SLUM246.TSC for simulation. PGb needs to be corrected in the PSpice file.

slum246.tsc

Best Regards, Rakesh

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TPS2493: PSpice for Ti - Wrong PG polarity