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Tool/software:
test environment: PPC3-EVM-MB+TAS2562-EVM-DC Load: 8ohm+33uH input: 1K@0dBFS sine wave DC_power_Suply: 4.2V@10A
the default value of 2562 controlled by PPC3 is not adjusted
When VBAT below 4.2V,It was found that PWMP and PWMN have a probability of no output, and at this time, the PPC tool did not report any abnormal irq
1. If the output amplitude is adjusted to -0.5dBFS, PWM will be relatively stable and there will be no abnormalities.
2.There will be no abnormalities when VBAT is 5V
3 When the frequency is lower, there are more anomalies, but when the frequency is higher, the probability of anomalies is relatively small
Hi Gan,
I was able to test with default settings and 4.2V battery connected directly to VBAT. Please refer ot the below captures:
Best regards,
-Ivan Salazar
Applications Engineer
Hi Gan,
Attached is the test result:
One special note on VBAT=3.6V: The default settings will have higher THD+N as shown in the dimmed dark-blue curve. After increasing the boost limits as the below PPC3 capture, the performance improves as shown in the bright-blue curve (around 0.1%).
Best regards,
-Ivan Salazar
Applications Engineer
Hi Gan,
We use these resistor/inductor loads, connecting to the 8Ohm side has the two 4Ohm resistors in series.
Best regards,
-Ivan Salazar
Applications Engineer
In your picture,it seems your load is one 8ohm and one 4ohm connect in series,so your test load is 12ohm?
in fact i also bought a few 2564 EVM,i find it under the condition of VBAT of 4V, the performance of 0dBFS is very poor,THD+N only have 5%,there is a significant difference from the 0.1% described in your datasheet.
