LM70880: LM70860, LM70860-Q1, LM70880, LM70880-Q1

Nikolai Orlov

Part Number: LM70880

Tool/software:

There are some discrepancies between schematic in datasheet, PDF dev board one, and Altium dev board schematic.

In particular Altium dev board schematic has extra components not present in other schematics or Webench suggested design.

1. Snubber circuit (C13, R9)

2. Extra component in current FB (R12, C22).

See attached screenshots.

Please advise if they are necessary and if yes then what are the criteria to choose their value.

Thank you!

2 months ago

0 Nikolai Orlov 2 months ago

Intellectual 350 points

Can someone answer this question?

0 Nikolai Orlov 2 months ago in reply to Nikolai Orlov

Intellectual 350 points

Hello?

0 Taru Kapoor 2 months ago in reply to Nikolai Orlov

TI__Genius 11235 points

Hi Nikolai,

You can keep these as DNP. The snubber circuit is there to help you with MOSFET ringing (if you see it is beyond acceptable limits for your design) and the RC in the current sensing path is for filtering any common mode noise - again this is not necessary and you can keep it DNP. These are just some extra provisions for you to play around with during your development phase and are not necessary additions to the circuit.

I also apologise for the delay here - I was out of office for the past week.

Thanks,

Best Regards,

Taru

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LM70880: LM70860, LM70860-Q1, LM70880, LM70880-Q1