can you send pictuure of your PCB ?
Oscillating Mosfets ?
which Mosfets do you use and how much Rail
can you make some tests ?
1. IRFP 460 is different compare to Mosfets in original design
2. can you check about stray inductane or oscillation in output stage ?
3. Did you use right component value for Rail Voltage ?
4. Does this amp working, can you listen music ?
Finally,... is it possibile 2011 ucd design and schematic is a fake ?
or impossibile for stable working
regards
1. IRFP 460 is different compare to Mosfets in original design
2. can you check about stray inductane or oscillation in output stage ?
3. Did you use right component value for Rail Voltage ?
4. Does this amp working, can you listen music ?
Finally,... is it possibile 2011 ucd design and schematic is a fake ?
or impossibile for stable working
regards
Hello my friend
My wrong is right ir2110
I could listen to music, but low power
Are you created this Amplifier?
My wrong is right ir2110
I could listen to music, but low power
Are you created this Amplifier?
HI, i built this amplifier and output sound is OK, but i have two problems:
- output coil is very hot, every time
-is there a dc offset about 250mV
My power supply is +-45V and speaker impedance is 8ohm.
Any idea?
Thanks
- output coil is very hot, every time
-is there a dc offset about 250mV
My power supply is +-45V and speaker impedance is 8ohm.
Any idea?
Thanks
actually Im designing PCB LAYOUT for Test and will be finished in about 1 or 2 days
I hope I dont waste my time
What do you mean with right IR2110....Fake IC ?
but it can be you need another Mosfets..lower Input Cap or RDS on
hi
greetings reading spanish forum ic shown on pcb is ir2113 schematic shows
it ir2110 is it possible on amplifier built by tatacom
1 any substitute for diode in5189
2 details of coil 33uh wire diameter no of turns core diameter
thanking you
andrew lebon
greetings reading spanish forum ic shown on pcb is ir2113 schematic shows
it ir2110 is it possible on amplifier built by tatacom
1 any substitute for diode in5189
2 details of coil 33uh wire diameter no of turns core diameter
thanking you
andrew lebon
Ucd
I have examined the schematic and there are several issues which will cause serious problems.
1) There is no provision for any dead time
2) The MOSFETs shown are old, slow and are not suitable for high frequency switching
3) The gate resistors should be reduced to about 4.7 ohms and use IRFP4229 or some of the newer INFINEON MOSFETs which are superb.
4) The snubbers across the output MOSFETs reduce the resistor values to about 10 ohms.
5) Use 0.1mfd 100v chip caps ate the actual pins of the MOSFETs to ground (Upper Drain and lower Source)
6) Use a bunch of 0.1mfd 200v chip caps from +40v to -40v as close to the MOSFETs as possible.
7) The UF4004 bootstrap diode is too slow use a 35nsec 200v diode.
8) To keep the output offset low a servo MUST be used from speaker output to LM311 pin 2
Steve
I have examined the schematic and there are several issues which will cause serious problems.
1) There is no provision for any dead time
2) The MOSFETs shown are old, slow and are not suitable for high frequency switching
3) The gate resistors should be reduced to about 4.7 ohms and use IRFP4229 or some of the newer INFINEON MOSFETs which are superb.
4) The snubbers across the output MOSFETs reduce the resistor values to about 10 ohms.
5) Use 0.1mfd 100v chip caps ate the actual pins of the MOSFETs to ground (Upper Drain and lower Source)
6) Use a bunch of 0.1mfd 200v chip caps from +40v to -40v as close to the MOSFETs as possible.
7) The UF4004 bootstrap diode is too slow use a 35nsec 200v diode.
8) To keep the output offset low a servo MUST be used from speaker output to LM311 pin 2
Steve
Im a little confused because in Spain DIY Forum the amplifier should working very good..
can you add important changes in schematic and share your experience and knowledge with us ?
hi workhorse
greetings any comments on schematic any mistakes any sugesstions with your expertise this project can be possible for all d class
fans hoping you can help
thanking you
andrew lebon
greetings any comments on schematic any mistakes any sugesstions with your expertise this project can be possible for all d class
fans hoping you can help
thanking you
andrew lebon
Shavano Music Online - Cross-Over Network; Air Core Inductor Calculator
Use above link
Hey and did u check about availability of IR2110 and other components? I fear it might not be easily available here in India.
And guys. can anyone provide TS of this amplifier. ( like Frequency response, Inter-modulation distortions, THD, slewrate)
Last edited:
In the kingdom of the blind the one-eyed are kings, but here we are in a two-eyed forum.
This amplifier in some cases can play loud music without overheating or destroying itself, but the design is full of pitfalls. In fact, those pitfalls make the result quite random, some units will work and some won't, depending on parts, etc... (too many parameters overlooked by the designer).
Electromagnetic interference will be quite high too.
Have you already tried to build this simple amp with its "very good component selection"? 🙂 Any photos?
no but you don't see me complaining and criticizing other peoples work i take you and eva have something in common then. 🙂
just try to build this amp and get it working, it is "so simple" (please do not forget to post some photos). 🙂 I am pretty sure, there will be some troubles with it, but we do not see you complaining and criticizing then 😉