DRV8462: loss calculation?

Stefan Lintner

Expert 5125 points

Part Number: DRV8462

Hi team,

Could you please help estimate the expected power losses on the DRV8462?
Could you please provide some data on this?

Besides thermal and switching losses, what other losses should I expect?

BR,
Stefan

over 2 years ago

+1 Murugavel4637 over 2 years ago

TI__Mastermind 44425 points

Hi Stefan,

Thanks for reaching out to us with this question via this forum. I'd like to point our a few existing resources on this topic that will address this question for the customer. Firstly, section 8.2.4 Thermal Application, page-104 of the DRV8462 datasheet https://www.ti.com/lit/ds/symlink/drv8462.pdf. Note, this dissipation is without auto-torque feature enabled, calculated for a specific fixed current. DRV8462 features auto-torque, which will automatically reduce current if the load torque is lower and vice-versa. This will reduce the thermals significantly.

Second resource, please check out this thermal calculator, "[FAQ] How to estimate die temperature of Stepper Driver?" https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1166656/faq-how-to-estimate-die-temperature-of-stepper-driver?tisearch=e2e-quicksearch&keymatch=FAQ%20stepper%20die%20temperature%20estimat.

Regards, Murugavel

Motor drivers

Motor drivers forum

DRV8462: loss calculation?