Hello,we plan to design a fully digital Class-D audio amplifier based on STA309A/STA311B and STA516BE, STA516B, STA510A, STA510F.Datasheets of the related parts use the terms "DDX" and "FFX". But I can found nowhere any explanation what thet technology is about.Could you please help on:What is the difference of DDX and FFX? Just different name for the same thing?What is the difference between DDX/FFX and ordinary PWM?Could I combine any DDX or FFX PWM generator with any DDX or FFX power stage? Or does DDX and FFX have to be used at both ends?Thanks a lot for your support.Kind regardsAndreas

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Question

Explanation on FFX and DDX and comparision to PWM.

Hello,

we plan to design a fully digital Class-D audio amplifier based on STA309A/STA311B and STA516BE, STA516B, STA510A, STA510F.

Datasheets of the related parts use the terms "DDX" and "FFX". But I can found nowhere any explanation what thet technology is about.

Could you please help on:

What is the difference of DDX and FFX? Just different name for the same thing?
What is the difference between DDX/FFX and ordinary PWM?
Could I combine any DDX or FFX PWM generator with any DDX or FFX power stage? Or does DDX and FFX have to be used at both ends?

Thanks a lot for your support.

Kind regards

Andreas

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