LM25069: Connecting external current sens amp to IRIM resister

Kazuki Kuramochi

Part Number: LM25069

Hello Expert,

I have question regarding LM25069.
I'd like add external current sens amp for IRIM resister between VIN and SENSE.
I think there is any problem if input impedance is sufficiently high but I'd like to confirm whether there is any problem regarding this use-case.
Would you check it?

Thank you and best regards,
Kazuki Kuramochi

over 3 years ago

0 Praveen GD over 3 years ago

TI__Guru 57737 points

Hi Kazuki,

There shouldn't be any issue if the Sense resistor of Hotswap is used by an current sense amplifier also. As you rightly said, the only care about here is to make sure the impedance of the Amplifier is very high.

0 Kazuki Kuramochi over 3 years ago in reply to Praveen GD

TI__Genius 9160 points

Hi Praveen,

I get it.

Thank you and Best regards,
Kazuki Kuramochi

Power management

Power management forum

LM25069: Connecting external current sens amp to IRIM resister