We use the TPA3251D2 for the audio power design, we choose 2N + 1 input mode, the and now we have the design issue as below testing result:
The schematic diagram as below:
The testing result as below:
1. We test the /Reset and /Fault waveform when power on, the /Reset is low:
2. We test the /Reset and VDD waveform when power on:
3. We test the /Reset and /Fault, and manual reset:
4. We test the ouput, and the power is normal when we manual reset, and then, there are no ouput current after about 5second;
We consider our design is error and the Reset is remain on low voltage, we have no idea to solve this problem, please kindly review and supply your comment, thanks.