Yes, I may go for new version. But what would the noticeable difference between these two?
Thanks in advance NMOS?
Good evening to all.
Can someone send me the files of version 3 of AUD600?
Thank you all.
luizcpimenta@yahoo.com.br
luizcpimenta@gmail.com
What design would you recomend for 700w at 4 ohms and also has a low part count and pcb and dosent need expensive parts
tested today irs900D, run with +- 47.6 vdc, mosfet irf540, gate resistor 33 ohm and 1n5819, pushing hard no porblem, 3.3k 2w feed with 5.6v zener diode for that voltage, the value may vary for high voltage. using car amp toroid 22 uh awg 16 and filter cap .68uf , coil with 1.3mm air gap no heating at all with full blast.
regards
Azmi.
regards
Azmi.
Simple D class amplifier non smd part, without feedback.
http://www.hobbielektronika.hu/forum/getfile.php?id=191446
http://www.hobbielektronika.hu/forum/getfile.php?id=191441
Just for the record, since few of them here can understand hungarian. (Highand I reccomend you to post a google translated link of the HE forum, so others can see the discussion),
I (and others) doubt the performance characteristics of this amp, as stated by Highand.
It has lot of issues, for example but not all:
- P channel FETs have bad diode, high Coss realteive to their high Rdson, due to material science reason (hole conductivity vs. electron cundictivity). They won't be so much beter, however N channel FETs have improved gradually, and they are still improveing.
Although Highand stated that schematic can be modified to all N-channel, then It looses all the pros Highand state.
Even though Highand stated, and simulations show that diode recovery lossses are decreased, I state that they are still higher than using modern all N-channel FETs. (also the zeners applied to to this "trick", dissipate much, so total some of dissipiation is not decreased so IMHO).
- lack of feedback gives absolutely no control about the output LC filter, it does not supress distortions in the half bridge (they exists and they are not neglictable, just see an IRF Class-D application note), and also does not suppress power rails variations.
Since Class-D gain is dependent on supply voltage, any ripple the supply has, or any decrease the supply has at high output pulses, it will show on the output.
- In a normal Class-D amp designers all do everything to make the amp produce as high and as low duty cycles as it is possible, to make as much ourput as possible from the same supply and the same votlage rating FETs, before the modulation error kicks in. Higher votlage rating FETs are always worse, or more expensive (if they have the same good specs). In this design the duty cycle must be limited due to the applied gate driving network. This is not a trick, this is absolutely bad design goal IMHO.
These and other issues are discussied in the Hungarian forum.
Does the amp start to oscillatenn with low level input signal and the noise gone ?
I want to know is those problem solve now ?
Class d can be touchy about starting up.
The 2092 class d chip sits with 17 volts dc on the output if no speaker is connected !
Once a speaker is connected it then works ok.
It looks like your circuit is starting to oscillate then stops hence the clicking.
I can see a decaying oscillation.
You need to look at the positive feedback that gives oscillation.
The 2092 class d chip sits with 17 volts dc on the output if no speaker is connected !
Once a speaker is connected it then works ok.
It looks like your circuit is starting to oscillate then stops hence the clicking.
I can see a decaying oscillation.
You need to look at the positive feedback that gives oscillation.
Hi Nmos,
Level shifter not good,adjust the resistor value to get min. 1v and max. 3.3v signal with respect to -ve supply rail.
all sigma delta design freq. is depend on feedback resistor,filter coil,MOSFET,IC(TL071),2x1nF capacitor and 1K resistor.
Regards
MANOJ
How about your AUD 600 Amp Rev 3.0
Does AUD 600 Amp amp have the same problem or is here the problem solved ?
Hi NMOS,
AUD600, no issues it will start at very low signal input and no noise low temp at full drive and good sound.
Regards
MANOJ
D
Deleted member 148505
Hi Manoj,
Did you check the AUD600 for possible latch-on of high side output during power up and overstress condition?
You can test it by disconnecting any load in the amplifier, shorting the output and put an input signal. It will trigger the over current protection,
Let us see if the high side mosfet (or your amp) survives with continuous triggering of over current protection. 🙂
Did you check the AUD600 for possible latch-on of high side output during power up and overstress condition?
You can test it by disconnecting any load in the amplifier, shorting the output and put an input signal. It will trigger the over current protection,
Let us see if the high side mosfet (or your amp) survives with continuous triggering of over current protection. 🙂
Can you give some more info on that smps,i want to build one,but can you give me pcb and layout
+40V 0v -40v / 10A SMPS For Power Amplifier post#9
Hi PetruV
greetings i have not finished the pcb layout as the core i am using is small for 130
volts dc+/- for my dclass amp if you are new to smps please make the smps from the link above i dont think there is a more EASY smps than this for first smps it can be made on
dot pcb i used IRF460 for fets 15 volts dc can be modified easier if you want so my sincere advice make this smps any help you need will be extended to you just start this smps
warm regards
andrew lebon
Hi PetruV
greetings i have not finished the pcb layout as the core i am using is small for 130
volts dc+/- for my dclass amp if you are new to smps please make the smps from the link above i dont think there is a more EASY smps than this for first smps it can be made on
dot pcb i used IRF460 for fets 15 volts dc can be modified easier if you want so my sincere advice make this smps any help you need will be extended to you just start this smps
warm regards
andrew lebon
Hello
greetings whats the most powerful mosfets for d class pushed amp till 140 volts dc+/-
on 300 volt fets
warm regards
andrew lebon
greetings whats the most powerful mosfets for d class pushed amp till 140 volts dc+/-
on 300 volt fets
warm regards
andrew lebon
Hi Manoj
greetings already amp is playing on 140 volts dc +/-
i will post pics of working amp any more powerful fets with higher rails
warm regards
andrew lebon
greetings already amp is playing on 140 volts dc +/-
i will post pics of working amp any more powerful fets with higher rails
warm regards
andrew lebon