TAS6754-Q1: TAS6754Q output power not right

Chunjiang Wu

Part Number: TAS6754-Q1

Tool/software:

Hi,

I have make a TAS6754Q test bord. Now the IC has work, the PWM 2MHz is OK. But the output level is not right, only mV level.

Witch could cause this.

my input is FS=48k,SCLK=3.072M,I2S,

or TI could offer the basi register set.

Thanks

25 days ago

0 Gregg Scott 25 days ago

TI__Mastermind 44855 points

Chunjiang,

To make all four channels work, they need to have a load. And you need to change the state to play mode get audio output. Your clocks are correct for 2 channels of 32bit I2S audio. Channels 3 and 4 will not have audio by default. You will need to set these up correctly using register 0x9F and applying the SDIN to the GPIO pin that is selected.

Regards,
Gregg Scott