Overcurrent protection circuit of TPS40170

Satoshi

Guru 19605 points

Other Parts Discussed in Thread: TPS40170

Please let me know about three point below of over current protection circuit.

(TPS40170 datasheet page 16)

①Is red area inverting function only? (no amplitude?)

②About red area, Is there spec of two resister value?

③Is overcurrent accuracy depend on line impedance of SW node?

Best regards,

Satoshi

0 Satoshi over 8 years ago

Guru 19605 points

Any update on this?
I want to know meaning of internal AMP (red area).

Best regards.
Satoshi

0 JohnTucker over 8 years ago in reply to Satoshi

Let me see if I can get someone to support this.

0 Qian Chen over 8 years ago

Hi Satoshi

Is red area inverting function only? (no amplitude?)

Reply: yes, it is invert only.

About red area, Is there spec of two resister value?

Reply: Sorry, I don't know the reisistor value.

Is overcurrent accuracy depend on line impedance of SW node?

Reply: I don't think so because the SW trace does not contain large current.

Thanks

Qian

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