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Trouble with the DRV2603EVM-CT
Part Number: DRV2603
I have an LRA application that seems to be working fine (it buzzes), but when I inspect the waveforms they're not matching the DRV2603 datasheet Figure 2. The driver seems to be skipping pulses and I was wondering if someone could comment if this is somehow expected behavior. In the attached scope capture we're running a test sequence where we drive the haptic at 25, 50, 75, and 100%.
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In reply to Luis Fernando Rodriguez S.:
At full scale drive, the PWM signal pulses low once per cycle for about 200nsec. The PWM frequency is 30.6kHz and the amplitude is about 3.3V.
I think the part I've circled in purple matches Figure 2 of the datasheet, but everything else seen here in the red differential drive waveform does not.
Edit: VDD voltage is 3.5V
In reply to Arthur Thompson27:
Here is the waveform at both outputs and the differential output with no load connected. What are you able to determine from this information?
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