Hello and thank you for a very interesting device
I would very much like to try you sensor in my DPT setup, however in my case there is a possibility to make DPT only for the high side transistor. In your datasheet it is marked as "not recommended".
Could you please explain why you do not recommend using the sensor in this application?
If because of the possibility of damaging it.
Can you please tell me if I can use it with an operating voltage of 50V and a rate of change of 20A/ns, the parasitic inductance of the PCB without the sensor is 200 pF?
And could you please tell me the typical parasitic inductance of the sensor? I understand 0.2nF is the maximum, right? Best regards, Max
Hi Max,
In high voltage rigs we advise against use on the high-side drain, because the sensor requires measures to ensure safe clearance and creepage distances between the sensor's connector and any traces, pads, and component terminals on the board.
In lower voltage rigs, the high-side DC connection tends to have voltage disturbances on it, and these can couple capacitively into the sensor, if you are switching very fast or if you have high frequency ringing (e.g. several 100 MHz).
That's said, we have used these sensors on the high-side to measure drain current.
The typical inductance of the sensor is around 0.1nH on a well-designed board. This is due to the added space that you create on the board to accommodate the sensor. Once you have created this space, there is negligible added insertion inductance when you actually place the sensor.
Hope this helps,
Kind regards,
Infinity Sensor