[DRV3204-Q1] Impact of variability of current sense resistor

Takao Yamamoto

Genius 4135 points

Dear all,

I would like to know about these.

Q1. If Rsns (current sense resistor) have large variability, what kind of impact does Rsns have on VCCOC?

Q2. Are there anything to apprehend other than VCCOC under large variability of Rsns?

Best regards,

over 10 years ago

0 Rick Duncan over 10 years ago

TI__Guru** 114905 points

Hi Yamamoto-san,

Our expert is being notified and should reply soon.

0 William Toth over 10 years ago

TI__Expert 3555 points

Yamamoto-san,

Q1. The impact on VCCOC is clear based on the datasheet equation:

0.2V = Rsns*VCCOC (Note on page 26)

And the electrical characteristic as per the spec (page 27) shows VCCOC is 300 - 550mA based on Rsns = 0.51ohm. So the above equation will show the effects based on the Rsns variability.

Q2. No, only the VCCOC

Regards,

Will Toth

Motor drivers

Motor drivers forum

[DRV3204-Q1] Impact of variability of current sense resistor