Can the Drv2605 output voltage be adjuested ?

Hi Alan,

Yes, the DRV2605 output voltage can be adjusted using the registers 0x16 (Rated Voltage) and 0x17 (Overdrive Voltage).  
http://www.ti.com/product/DRV2605/datasheet/detailed_description#SLOS8543618

Note that the DRV2605 is a Class-D style output, meaning that the output waveform is created using a carrier PWM waveform.  This means that the output will be either 0V or 5V, when VDD is 5V.  If you use the OUT+ and OUT- testpoints on the DRV2605EVM-CT we added filters so you can see the underlying modulated sine wave waveform.   The PWM switching frequency is 20kHz and the typical haptic output waveform is no more than 300Hz.

Let me know if you have any questions.

Thanks,
Brian

Thanks for your reply.
I have another question.
I can only play square wave, but I want playing effect like "Figure 3. ERM Click With and Without Braking (ROM)"
www.ti.com/.../specifications

Could you sample register define ?

Alan, 

Can you show a picture of what you are seeing?

Note that when you are configuring your oscilloscope, the time/div is on the order of 10's of milliseconds.  Ignore the 20kHz switching frequency.

Thanks,
Brian

Hi Brian

Thanks your reply and sorry update slowly for a few days.

I find my question answer which can adjust like "Figure 3. ERM Click With and Without Braking (ROM)"

On this below is my waveform

Can the red circle be drop waveform level on this below?

Hi Brian

Could you give any suggest?

Thanks. Alan

Hi, Alan:

what you see is a filtered output.

the ERM cannot respond to high frequency signals. please use a low-pass filter to see what signals come to the ERM

Hi, Peter

Sorry, I don't familiar to use oscilloscope.

So, I want to check.

1.  On the below,is measurement method correct? And don't connect vibrator.

2. What is low-pass filter, My colleague ask me is "Bandwidth", right?

If yes, my oscilloscope only can be adjusted  150MHz & 20MHz .

Thanks, Alan

Dear Peter
Get it!
So let me check again. The drv2605 spec.(www.ti.com/.../drv2605.pdf)
Figure 3. ~ 9. all use low-pass filter for measuring, right?

Thanks, Alan

Hi, Alan:

Yes.