DRV2605 Autocalibration Error with DMJBRN0934 LRA

Theo,

Does the actuator vibrate if you trigger the AutoCal?

Are you trying this on an EVM? If not, can you post the DRV portion of the schematic?

Here is a setup guide for the DRV2605 which you could find useful to cross-check: http://www.ti.com/lit/an/sloa189/sloa189.pdf

Regards,

Gautham

Yes it does vibrate during autocal, and I'm doing this on custom hardware. I'll try to get the schematic to you soon.

The setup guide looks like it might be helpful. I'll try a few things in it and get back to you.

Thanks

Here's my schematic, I tried changing the settings to match the setup file, but it still returns an error after calibrating.

Theo,

Looks like there is nothing on the outputs that could be causing the issue. How is the actuator mounted?

Do you have another actuator to test on? Can you also try with the settings below and trigger an AutoCal?

[ Also I noticed that the Vreg  is 100nF, recommended value is 1uF.]

Regards,

Gautham

//SEMCO0934 1p5Vrms

Commnd--I2CSlv--Addr--Data--Comment (All Values in Hex)

w--B4--01--05--Mode
w--B4--03--00--Library Selection
w--B4--04--01--Waveform Sequencer 1
w--B4--05--00--Waveform Sequencer 2
w--B4--0C--00--GO
w--B4--11--05--Audio To Haptics Control
w--B4--12--19--Audio To Haptics Minimum Input Level
w--B4--13--FF--Audio To Haptics Maximum Input Level
w--B4--14--19--Audio To Haptics Minimum Output Drive
w--B4--15--FF--Audio To Haptics Maximum Output Drive
w--B4--16--3E--Rated Voltage
w--B4--17--89--OverDrive Clamp Voltage
w--B4--18--09--Auto Calibration Compensation Result
w--B4--19--F5--Auto Calibration Back--EMF Result
w--B4--1A--B7--Feedback Control
w--B4--1B--93--Control1
w--B4--1C--EA--Control2
w--B4--1D--80--Control3
w--B4--1E--30--Auto Calibration Memory Interface

Gautham,

Still no luck with your recommended settings. 

The motor is hot-glued to a pcb inside a case, would it be beneficial to try on a free motor?

Thanks,

Theo