Tool/software:
Hello,
Is it possible to use the signal from the IPROPI pin to perform ripple counting of the brushed dc motor being driven by the DRV8873-Q1 or is the signal not meant for that kind of high resolution analysis?
Thank you
Tool/software:
Hello,
Is it possible to use the signal from the IPROPI pin to perform ripple counting of the brushed dc motor being driven by the DRV8873-Q1 or is the signal not meant for that kind of high resolution analysis?
Thank you
Hi,
Thank you for your question.
Normally ripple counting requires in-line current sensing. DRV8873-Q1 has IPROPI on high side FET, therefore waveform will not be same as in-line.
DRV8706-Q1/8714-Q1/DRV8718-Q1 gate driver family can support in-line like bellow. FYI.
regards
Shinya Morita
Thank you for your response Shinya. I was trying to avoid using an external shunt resistor. The DRV8214 driver is exactly what I'm looking for, but just doesn't have the 10A peak current rating I need. But the DRV8214 has the ripple counting feature built in through an internal current mirror, I was hoping the IPROPI pin would provide something like that current mirror capability that could be used to count ripples in the motor current waveform.
Hi,
Thank you for your feedback. DRV8214 is not automotive device(non Q1). If 10A is needed, I think DRV8706-Q1/DRV8714-Q1 is what we can propose.
regards
Shinya Morita