Hi,
I have a relatively simple question : What is the gain of a class D amplifier ? The voltage output of an push pull ouput stage is probably link to Vdd and to the PWM duty cycle ?
The other question is how I can compute the output power ? The output power depends on Vdd ? If I have a load which is equal to 4 Ohm. The ouput power is Vdd*Vdd/Rload ? (and the dead time, the power is probably less than the previous assertion ?) Assuming I have Vdd equal to 4V, it means i could connect a speaker which has a power (or peak power) of 4W? So the ouput power is directly proportionnal to the voltage that I applied on Vdd and of course to Vin because Vin influence the duty cycle. Actually the instataneous ouput power is something like P = (Vdd*D)^2/Rload and the duty cycle is a function which depends on Vin ...
If you could tell me if it is correct. I m actually trying to design a class D amplifier and the datasheet of my component recommands me to use a VDD which is equal to +-35V which is a lot ... I have on my shelf a 12 V transformer... It will be better if i could use it without doing a boost converter that I don't know to do like this class D amplifier. It will be good if i could do someting simple for the moment x)
Have a nice day !
I have a relatively simple question : What is the gain of a class D amplifier ? The voltage output of an push pull ouput stage is probably link to Vdd and to the PWM duty cycle ?
The other question is how I can compute the output power ? The output power depends on Vdd ? If I have a load which is equal to 4 Ohm. The ouput power is Vdd*Vdd/Rload ? (and the dead time, the power is probably less than the previous assertion ?) Assuming I have Vdd equal to 4V, it means i could connect a speaker which has a power (or peak power) of 4W? So the ouput power is directly proportionnal to the voltage that I applied on Vdd and of course to Vin because Vin influence the duty cycle. Actually the instataneous ouput power is something like P = (Vdd*D)^2/Rload and the duty cycle is a function which depends on Vin ...
If you could tell me if it is correct. I m actually trying to design a class D amplifier and the datasheet of my component recommands me to use a VDD which is equal to +-35V which is a lot ... I have on my shelf a 12 V transformer... It will be better if i could use it without doing a boost converter that I don't know to do like this class D amplifier. It will be good if i could do someting simple for the moment x)
Have a nice day !