Hi Pravpa.
Have you set up this amp?
Works perfectly?
Need a change?
I'm precuisando a good class D amplifier and want to ride without concern for errors in the layout.
Thank you.
AUD600
Sir,
This AUD600, has already been tried and test by Mr. Manojtm, and he found it's results are satisfactory.
Regards,
Pravpa
Sir,
This AUD600, has already been tried and test by Mr. Manojtm, and he found it's results are satisfactory.
Regards,
Pravpa
with aud600 ir900 and ir4k5 with my experience is 20turns of etd 38 which is about 18uh and output fets are cool but with 70uh all the above amplifiers : the outputs heat even at low volume with an 8ohm load
Hi Stewin ,
as I know , choosing the right value for inductor depends on your load.
for example if we want to connect 8 ohm loads to amp (C=470nF) , you will need a 120uH inductor. also for 4 ohm the value is about 30uH.
we can select middle of those value : 120+30/2 = 75uH ~ 70uH.
with 70uH , the best load should be around 6 Ohm. but i don't know what is the effect with other loads.
Regards,
IRSound
as I know , choosing the right value for inductor depends on your load.
for example if we want to connect 8 ohm loads to amp (C=470nF) , you will need a 120uH inductor. also for 4 ohm the value is about 30uH.
we can select middle of those value : 120+30/2 = 75uH ~ 70uH.
with 70uH , the best load should be around 6 Ohm. but i don't know what is the effect with other loads.
Regards,
IRSound
IMO, it just needs to start rolling off ABOVE 20kHz and be down around -40dB at fSW. Obviously you don't want any (or minimal) peaking at or below 20kHz.
Playing around with that calculator you will see it's difficult to get a filter that works ok with both 4R and 8R loads. You either end up with excessive peaking or roll-off at the cut-off frequency.
Playing around with that calculator you will see it's difficult to get a filter that works ok with both 4R and 8R loads. You either end up with excessive peaking or roll-off at the cut-off frequency.
Hi Manoj!
does this applies to AUD600?
You have mentioned T106-2 iron powder, I have them and I wanted them to be of use on AUD600, but before that....a few question here..
Can I power this amp using a lowly -/+35vdc? Was there a needed adjustment on the circuit?
Can I also use an external 12vdc bias circuit? (not the one on your psu board)
Please guide.
Regards!
Yes, you're right.
i found inductor should be around 38uH for C=470nF and R4~8Ohm. but with lower and higher impedance you will have a bad step response.
i have another question , is the DC resistance of inductor is important in Class-D LPF ? because with lower AL value cores (like micrometals -2 series) you will have higher number of turns and lower number of turns for higher AL value cores.
Regards
