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STSPIN958 H-Bridge, current measurement in II and IV quadrant?

SSCOKM
Associate

We have a prototype board with the STSPIN958 full bridge but we see that it cannot measure positive current (in coil) when the voltage is switched negative, output shows current = 0.

We switch from 48V to -48V on the coil. (turning the magnetic field off fast)

When the current becomes also negative then we have a measurement again.

So we have a blind spot after the voltage polarity on our output changes.

 

Is there a configuration with this IC to keep measuring the current after the voltage polarity switches?

 

Thanks

 

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