Other Parts Discussed in Thread: DRV2604, , DRV2603
We get the samples of DRV2604, and DRV2605 and checking the output frequency with microscope, the output waveform from the IC is as belows. It is not a sine wave, is it correct?
The vibration strength is not good as we expected. We also notice that the current draw is lower than previous one when we are using DRV2603.
Now, we are using 70% PWM (our software set the Real-Time Playback Input (Address 0x02 with vlaue of 88 decial).
Even we try to set 100% PWM, the driving strength is still not good as we expected.
There are many register can be set in the IC, now we have set
N_ERM_LRA = 1
LOOP_GAIN = 1 Medium (default)
BEMF_GAIN =2, 20x (default)
Any register setting will have greater effect to the driving power? Can u give some better suggestion for this?