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Per bridge power supply for TAS5706B

Other Parts Discussed in Thread: TAS5706B

Hey TI,

I would like to design a high quality stereo amplifier using the TAS5706B in 2.0 bridge mode, to drive 8Ω loads.

For power supply I'm currently looking at the TPS7A4700 / TPS7A4701 because of its ultra low output noise, aiming for something around 20V.

As it only has 1A max. output, I would like to use one for DVDD/AVDD and then one for each pair of half-bridges (one TPS7A4700 for PVCC_A and PVCC_B and one for PVCC_C and PVCC_D).

Is this at all possible? If so, would it be better to use one for each half-bridge (so using four instead of two). Does it have an effect on audio quality? Would I require extra circuits for this approach (maybe trimmers, additional caps, etc)?

If this is not a good route to go, could you recommend another single regulator to drive all PVCCs with?