Conclusion
The bridged-Tied class-D audio amplifier chip and PCB are desinged and tested in this project, summary of the performance is listed in the table below.
| Parameter | Value |
|---|---|
| Analog supply voltage (AVDD) | 1.8V |
| Power supply voltage (PVDD) | 1.8V |
| Voltage gain (S/E input to differential output) | 0.5-2.5 |
| PWM frequency | 630kHz |
| Peak output power for 8$\Omega$ load (1kHz) | 167mW |
| Average $\eta$ | 85% |
| Typical THD | -45dB |