DRV8803: DRV8803 EMI issues

shishod pp

Part Number: DRV8803

we are planning to use DRV8803 to drive 4 solenoid at a time and solenoid rating is 24V and 100mA. If we are used 4 solenoid to drive at a time and suddenly if i turned of may be 2 or 3 solenoid out of 4 solenoid then will it cause any EMI issue?

over 1 year ago

0 Pablo Armet over 1 year ago

TI__Mastermind 37683 points

Hi Shishod,

I can't really answer your question. EMI is dependent on many factors not only on the number of solenoids being driven.

I recommend looking at this training video which provides more information on EMC/EMI considerations for motor drivers.

Regards,

Pablo Armet

0 shishod pp over 1 year ago in reply to Pablo Armet

Prodigy 105 points

Hi Pablo Armet,

Thanks for your reply..

I need to know the parasitic capacitance value to find out the noise current. My specifications are given below,

dv clamp=15V

dToff=0.3msec

if you have the parasitic junction capacitance value , please share it ..if you don't have the value can i know will it impact the scenario (3 solenoid is ON/OFF) then INOISE will it impact on 4th solenoid ?

0 Pablo Armet over 1 year ago in reply to shishod pp

TI__Mastermind 37683 points

Hi Shishod,

The junction parasitic is very low and I don't expect it to affect EMI noise. It becomes important in RF applications where the frequency can be in the high GHz range. For motor driver applications, what matters is the parasitics of the PCB traces, length of power and motor cables, etc.

I found this other training video with more information on motor EMC design guidelines.

Regards,

Pablo Armet

Motor drivers

Motor drivers forum

DRV8803: DRV8803 EMI issues