DRV8262-Q1: Regarding the DRV8262-Q1 applicable to single H-bridge circuits, the calculation formula for I PROPI current value

Hi Team

    I am currently using the DRV8262-Q1 driver chip. Now, I am encountering a problem when calculating the current. The actual current value is smaller than the current value sampled (I PROPI). I set R IPROPI to 1200Ω, and the MCU's ADC is powered by 5V with a 10-bit ADC. I calculated that the current value corresponding to the ADC is 5/(1200*1024*212*10-6) *1000 = 19.19mA/ADC. Could you please help me verify if this is reasonable?

Thank you.

Taylor：

您好，

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

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David：

hello Taylor

         我们能邮件往来吗？这样是否效率高一点？

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Daniel：

您好 David

Thank you for your questions. To verify IPROPI function, I need ask you to use oscilloscope, not ADC value in MCU.

Need to measure 

1)voltage: IPROPI1  (1V/div)

 2) OUT1 current by current probe

with ~100us/div

If you have 10A on OUT1, V_IPROPI should be 2120uA * 1200ohm =  2.54V

,

David：

hello Daniel

       My question is already solved.

      Thanks