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Hi, Guillaume,
I don't support the TAS3308 (I'm on the TAS5631 side of the house), but you need some kind of mode to slowly ramp up the PWM outputs from the 3308. The problem is, the outputs need to be biased at half your power supply in SE configuration, and how you get from zero to that voltage is all about pop.... We also have some split-cap configurations, but again, if there is any difference in voltage on the two sides of the speaker, a pop will occur. Pop is tough to get rid of in SE mode...
Take a look at the TAS5086 d/s. We have an extra output on that bad boy to drive the split-cap for SE mode. I don't think TAS3308 has this feature...
-d2
Hi Don
I take a closer look on the TAS3308 documentation, apparently the chip have a start-up procedure who handle SE configuration.
But i'm not sure if TAS5631 is compatible with it, could you confirm ?
" The TAS3308 provides an soft start initialization sequence that charges the split capacitor through the
loudspeaker. In order to do this without audible artifacts the charge current is limited by applying a start
sequence which charges the output state between low, high and high-Z. Because the output stage is in high-Z in
a part of the sequence, the resulting output impedance can be brought to a level suitable for charging the split
capacitors without audible artifacts. This solution does not require external components, as shown in Figure 5.5.
Not all power stages are compatible with the mid-Z scheme. Please refer to the power-stage data sheet for
compatibility.
To support single ended operation the TAS3308 has a soft start circuit which charges the split capacitor. This is
controlled by the PWM Duty 50 Mode Control register (0x1D). "
Thank's
Best regard