TPA3110D2: Enquire chart for THD+N vs output power at VCC=12V and RL= 4Ohm

Thanks Derek.

It looks BTL is a little limitation for these condition. Thus, do BU have the chart for VCC=12V and RL= 4Ohm in PBTL application?

Best regards,

Tiger

Hi Tiger

   For this using condition, the BTL is not the limitation, the VCC12V voltage is the limitation.

   In the datasheet, Rdson value of this device is 240mohm, and usually output inductor have another 50mohm Rdc. There's two Rdson and two inductor to divide the voltage with your 4ohm load. When only 12V voltage supply, only 10.4V voltage Max could give to load. And using this value as sinewave peak, you even can't get 15W output. So the output will already clipping when working to that power, that's why you would see THD quickly going up in the chart. 

  Changing to PBTL won't able to have any difference, the voltage is not large enough to create larger current, or power.

Hi Shadow,

However, it should be okay to 15W with 1% THD+N at 4Ohm speaker and 12V according to Figure 32 for PBTL.

But it should be a risk to have 15W 1% THD+N with 12V for sure.

Thus, will recommend to using higher PVCC.

Thanks and Best regards,

Tiger