TPS63020: and TLV62090 input combined, if have EOS risk

Hui Cao22

Part Number: TPS63020
Other Parts Discussed in Thread: TLV62090

Tool/software:

Our OBU board recently had some cases of TLV62090 and TPS63020 damage.

Our two TPS63020 and two TLV62090 are powered by one power supply. Currently, we suspects that there may be problems in phase stability when the four chips are connected in parallel, leading to eos risk.

Could you please evaluate the phase stability of 4 chips in parallel state? The input of the 4 chips is combined together.

2 months ago

0 Tao Zhang 2 months ago

TI__Mastermind 29290 points

Hi Cao,

Could you share more details about this damage? both four device are damaged? what kind of damage you observed?

What do you mean about phase stability?

Regards

Tao

0 Hui Cao22 2 months ago in reply to Tao Zhang

Intellectual 760 points

Mainly want to check the phase margin, loop stability, loop gain, please help check these characteristics of our design have any problems？

0 Tao Zhang 2 months ago in reply to Hui Cao22

TI__Mastermind 29290 points

Hi Cao,

From my side, would like to say that no loop issue found about TPS63020 part.

Regards

Tao

0 Hui Cao22 2 months ago in reply to Tao Zhang

Intellectual 760 points

4 chips in parallel as the figure, you mean it's OK, right?

0 Tao Zhang 2 months ago in reply to Hui Cao22

TI__Mastermind 29290 points

No, i mean for TPS63020 itself.

0 Brigitte 1 month ago in reply to Tao Zhang

TI__Guru 63005 points

Hello Cao,

I expect that your issue is solved now, as there was no answer from you up to now. I will close the thread now. If you have further questions, just post below or if the thread is locked, start a new thread.

Best regards,
Brigitte

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TPS63020: and TLV62090 input combined, if have EOS risk