New chip from TI: TAS6424-Q1 75-W 2.1-MHz Digital Input 4-Channel Automotive Class-D Audio Amplifier | TI.com
75W and lower distortion than the previous 20W I2S amplifier-on-a-chip TI products.
TAS6422 is 2-channel BTL; TAS6424 is 4-channel BTL.
Cheers,
Mike
75W and lower distortion than the previous 20W I2S amplifier-on-a-chip TI products.
TAS6422 is 2-channel BTL; TAS6424 is 4-channel BTL.
Cheers,
Mike
From a quick read of the TAS6424 datasheet, the honest power level for the chip is about 30W into 4 and 50W into 2R. This is based on when the THD starts to quickly increase. The power figures you quoted are 10% THD, which IMHO is just criminal that the MFG can even use this level for a specification. Also, what is the point of have a "digital signal input" (via I2S) when the distortion level is really not all that low? Perhaps for easier integration into DSP controlled systems? This is, after all, intended for a car head unit amp and not for a standalone consumer amp...
With that said, it would be interesting to see what comes of these.
With that said, it would be interesting to see what comes of these.
You can get low distortion high output and even open loop with i2s from TI
http://www.ti.com/lit/ug/slau221a/slau221a.pdf
There are also several closed loop modules, but then you introduce analog feedback.
Open loop do require a very good PSU.
http://www.ti.com/lit/ug/slau221a/slau221a.pdf
There are also several closed loop modules, but then you introduce analog feedback.
Open loop do require a very good PSU.
TI is saying this new 2.1MHz chip has feedback around the power stage. So is it open loop or closed loop? Also interesting is support for line driver applications - anyone going to turn it into a kick-*** DAC? I'm keen to get an eval module if the price is right.
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