Other Parts Discussed in Thread: PCM5242, ,
Hi,
When customer use PCM5242+TPA3251 device to devolpment audio amplifier, we find some problem:
1. when use below PFFB circuit , it can work well, but the R_Z ( R3.3ohm/1W) are burn up easily.
Another, when system shut dow, it exsit POP noise. pls. give some advise .
2. When use the PCM5242+TPA3251 and refer the new PFFB circuit as below , TPA3251 can't work, can you help to check ?
3. When TPA3251 set to BLT mode and for two channel woofer (4ohm), the PVDD is 32V. TPA3251 is easily to OCP . The ROC_ADJ set to 22Kohm. We can't find the reason.