STSPIN230 Current Sense

[gadams]

In the datasheet for the STSPIN230, the pin description for SENSEU says "Sense output bridge U (must be connected to SENSEVW)."

Is this a hard requirement? I would like to be able to sense both currents separately with separate resistors in order to Kirchhoff's law the third phase current.

The application I'm looking at using the 230 for is a battery powered motor and I pretty much have to use FOC for several reasons. The STSPIN low power series all seem targeted for this application but none have all 6 PWM inputs and 3 phase current sensing.

[Peter BENSCH]

Welcome @gadams, to the community!

In fact, it is a hard requirement that SENSEU must be connected to SENSEVW - because there is only one amplifier for this in the STSPIN230.

For your 3-shunt control, however, you need three separate amps, i.e. one for each shunt, for which there is a dedicated device: STSPIN233.

Hope this helps?

Regards
/Peter

[gadams]

Thank you for the reply. I did see the 233 but the inputs are not the 6 pwm signals. I am not sure that is able to have the same response to the firmware. Specifically, there is no "High impedance (interlocking)" condition for the 233, as the truth table puts it.