Tool/software:
Hi team,
[Issue]
My customer is considering using the TPA2015D1. They are currently in the prototyping phase, but there is a noticeable difference in volume among the prototype boards. (All GAIN pins are set to High and connected to VBAT.)
[Troubleshooting]
- Based on the above, we suspected that the boards with lower volume might have an open GAIN pin due to a soldering defect. To verify this, we connected a TPA2015D1-EVM to the prototype board and toggled the GAIN jumper, but observed no significant difference in volume or output waveform.
- We also inspected the BGA soldering using X-ray imaging, but found no evidence of soldering issues.
[Questions]
- When switching the GAIN pin setting between Low (6 dB), Open (15.5 dB), and High (20 dB), does the internal amplifier stage actually change?
- Have there been any known issues or insights regarding significant volume variation between boards after assembly?
Best regards,
Kyohei