INA240EVM: can EVM handle 100A

Stani Bell Ngoufack Tchoufack89

Intellectual 2020 points

Part Number: INA240EVM

Hello,

i recently ordered the INA240EVM for my customer and he wanted to know if this board could handle a current of 100A? this isn't specified in the User's Guide as it is the case with the max voltage the board can handle.

Best regards,

Stani

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 292080 points

There it lots of copper between IN+/IN− and the pads of R3, but I doubt that it can handle that current. (Some calculator says that 100 A with a temperature increase of 100 °C would require a trace width of 43 cm, and would dissipate several watts.)

If you do not use R3 but connect the shunt resistor externally, then the current never flows through the EVM board.

0 Stani Bell Ngoufack Tchoufack89 over 4 years ago in reply to Clemens Ladisch

TI__Intellectual 2020 points

Hi Clemens,

thanks for your reply.

Up to how much current can the EVM handle?

Best regards,

Stani

0 Guang Zhou over 4 years ago in reply to Stani Bell Ngoufack Tchoufack89

TI__Mastermind 31410 points

Hi Stani,

The EVM is built with 1Oz copper and not meant to handle 100A. It can probably handle up to 50A instead with significant temperature rise of about 60 degrees, resulting in hot PCB surface temperature. However it might be possible to apply a pulsed profile with short duty cycle.

Regards, Guang

0 Stani Bell Ngoufack Tchoufack89 over 4 years ago in reply to Guang Zhou

TI__Intellectual 2020 points

Hi Guang,

thanks for your reply.

Best regards,

Sani

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INA240EVM: can EVM handle 100A