Part Number:DRV8886AT
Hello,
Our customer use the DRV8886AT.
The configuration of the customer as follows,
VM=15V
full scale current=770mA
1/16 stepping mode
STEP=770pps
Decay:Auto tune dynamic decay and Auto tune ripple control
I attached the evaluation results file.
(Please visit the site to view this file)
there is a ripple using Auto tune dynamic decay a little bit.
It seems a tBLANK is long. But the tBLANK is fixed as 1us.
So, I suggest the customer using Auto tune ripple control.
When using Auto tune ripple control, the tOFF is long as 100us. It is audible frequency.
The customer are worried about PWM frequency down to audible frequency.
Is there any impact on sound noise of a motor?
I think there is no impact on sound noise because a motor coil is affixed and no viblation.
Could you give me any idea?
Best Regards,
Naoki Aoyama