Came across the TAS6584 today, looks extremely interesting. Here are the major highlights from the datasheet:
These chips are currently listed as "preproduction" and do not seem to be available just yet.
Biggest news since TPA3255 IMO, Digital input, built-in DSP, 4 channel, what's not to like?
Looking forward to this!
https://www.ti.com/product/TAS6584-Q1
These chips are currently listed as "preproduction" and do not seem to be available just yet.
Biggest news since TPA3255 IMO, Digital input, built-in DSP, 4 channel, what's not to like?
Looking forward to this!
https://www.ti.com/product/TAS6584-Q1
As far as I read the DSP is not for the audio signal processing but for the PSU modulation, the datasheet says further down on 1st page:
"The integrated DSP of the TAS6584-Q1 enables Class-H envelope tracking control, eliminating the need for development of complex tracking software and making local boost voltage control possible without the need for an external microcontroller."
And the distortion THD+N 0.05% (8 Ω, 1 W, 1 kHz) is a bit behind TPA3255's 0.006% THD+N at 1 W into 4 Ω, a "good enough" automotive audio chip for your EV.
"The integrated DSP of the TAS6584-Q1 enables Class-H envelope tracking control, eliminating the need for development of complex tracking software and making local boost voltage control possible without the need for an external microcontroller."
And the distortion THD+N 0.05% (8 Ω, 1 W, 1 kHz) is a bit behind TPA3255's 0.006% THD+N at 1 W into 4 Ω, a "good enough" automotive audio chip for your EV.
:)
That is true, not a TPA3255 killer. I think that the biggest advantage is the digital input, there are a lot of exciting chips from TI now, like the TAS5634 and the newly released TAS6584 that point towards an increased focus on high efficiency designs that provide a lot of functionality in a compact single-chip solution. Things like digital input, integrated DSP sometimes even with filters/EQ and whatnot, add to this the experimenting with class G and H for controlling the power rail while still using a Class D topology. Very exciting!
The TPA325X family measures really well, but when you add other things to the signal chain (this being a signal chain the engineers at TI have NO control over, because it's your signal chain in your house), you often add noise and the performance is usually worse than what the datasheet says.
With these new chips it is more likely that end-users might see that datasheet kind of performance in their own systems, because they accept a wide range of digital signals, so most of the chain is just that single PCB vs traditionally 3-4 separate PCB's, some of which have noise prone cables or interfaces in between.
Easy to say that the distortion is not equal, and under ideal conditions you would be correct, then again the vast majority of TPA325X amplifiers sold are not quite up to datasheet level of performance.
The TPA325X family measures really well, but when you add other things to the signal chain (this being a signal chain the engineers at TI have NO control over, because it's your signal chain in your house), you often add noise and the performance is usually worse than what the datasheet says.
With these new chips it is more likely that end-users might see that datasheet kind of performance in their own systems, because they accept a wide range of digital signals, so most of the chain is just that single PCB vs traditionally 3-4 separate PCB's, some of which have noise prone cables or interfaces in between.
Easy to say that the distortion is not equal, and under ideal conditions you would be correct, then again the vast majority of TPA325X amplifiers sold are not quite up to datasheet level of performance.
