Hello everybody!
My knowledge of class D amplifier are few and i wish to build an power amplifier. I've builded so far an 1000W amp, wich is a clone of an auto amp (i don't give the name because i don't want to make publicity). The amp works fine, the schematic is here. The final final tranzistors are IRF complementary p and n.
I wish to modify this schematic, precisley the power stage because it uses p-mos and n-mos final tranzistors and i want to replace and modify p-fet into n-fet.
Concluzion: the entire final trazistors of power stage to be N-FET.
Any sugestion is welcomed.
SCHEMATIC : http://img19.imageshack.us/img19/9589/a6rg.jpg
P.S.:In the schematic i drawed only a pair of final tranzistors. In fact there are 6 pairs.
Help me pls!
My knowledge of class D amplifier are few and i wish to build an power amplifier. I've builded so far an 1000W amp, wich is a clone of an auto amp (i don't give the name because i don't want to make publicity). The amp works fine, the schematic is here. The final final tranzistors are IRF complementary p and n.
I wish to modify this schematic, precisley the power stage because it uses p-mos and n-mos final tranzistors and i want to replace and modify p-fet into n-fet.
Concluzion: the entire final trazistors of power stage to be N-FET.
Any sugestion is welcomed.
SCHEMATIC : http://img19.imageshack.us/img19/9589/a6rg.jpg
P.S.:In the schematic i drawed only a pair of final tranzistors. In fact there are 6 pairs.
Help me pls!
This seem a critical amplifier, duplicate it will be a problematic job;
you mus take in account feedbak coupling, oscillation etc etc.
The final stages seem be critical and redesign with no gain change should be problematic.Are sure you are ready for this adventure?
cicero32
you mus take in account feedbak coupling, oscillation etc etc.
The final stages seem be critical and redesign with no gain change should be problematic.Are sure you are ready for this adventure?
cicero32
That's exactly the same power stage I use In my old model 1200...They should not need 6 pair of output per channel, at +/-45V 1 pair should be lot enaught. Look at the thread of class d PCB needed, you will find my schematics. To use n-FET in upper stage, only use a 6N137 opto with a TC4429CPA mosfet drivers. Drive the opto coupler out-of-phase of you lower output (that will be easy, you have out-of-phase signal from your comparator) and enjoy it!
PS just add diode to discharge mosfet gate faster, this will help you a lot!
Fredos
www.d-amp.com
PS just add diode to discharge mosfet gate faster, this will help you a lot!
Fredos
www.d-amp.com
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