Hi expert,
My customer Joyson is using INA310A-q1 in their design. You can see the structure below.
The Imax=11A. However, when customer use the Current Sense Amplifier, the current over Rsense is below 1A.
When Imax =11A, Imax x Rsense x Gain = 11Ax 15mOhm x 100= 16.5V >Vsp
I have a question, when the Imax=11A the Vout is 3.3V right? rather than 16.5V. Is there any risk on such condition?
Kind Regards
Imelda
Hello Imelda,
From the "Absolut Maximum Ratings" section of the datasheet, the differential voltage between IN+ and IN- can only be a maximum of 12 V, so 16.5V would break the device. Here is the relevant section from the datasheet:
We do have other devices that can handle higher differential voltages. I'm not sure your system and accuracy requirements, so here is a full list of INA's with integrated comparators:
You can check these devices to see if they work for you. I did a quick check an noticed that the INA381 can handle a differential input of 26V, but more devices on the list can also support higher differential voltages. If you don't need the comparator, then we also have devices without a comparator that will work for this case.
Regards,
Mitch
