Hi team,
The customer uses TPA3221. The issue is once the PVDD is below 12V, the fault pin will be enable.
Then the customer needs to reset the TPA3221 device, it be can work properly.
The figure 1 is the customer's schematic. The yellow waveform for the figure 2 is the fault pin waveform.
The blue waveform for the figure 2 is the PVDD pin waveform. PVDD is 9V at this suitation.
The yellow waveform for the figure 3 is the fault pin waveform. The blue waveform for the figure 3 is the input signal waveform.
Would you explain this issue? Is the customer's schematic correct?
Figure 1
Figure 2
Figure 3
Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments
