Hi Manoj , i attached new schematic.
but IR2110S is correct in Apex D200 PCB because he replaced it with IR2110.
also why we should use 2W for R175 ? because mile tested this amp with 0.25w R175 ?
did you check your amps with DSO ? did you see my testing waves ? where is the problem..
sorry for lots of questions.
Regards
but IR2110S is correct in Apex D200 PCB because he replaced it with IR2110.
also why we should use 2W for R175 ? because mile tested this amp with 0.25w R175 ?
did you check your amps with DSO ? did you see my testing waves ? where is the problem..
sorry for lots of questions.
Regards
Attachments
Hi Mile ,
could you please tell me the complate part number of your ICs and their manufacture ?
Regards
hi Don, sory to late answer,
do you have any schematic for fullrange d500, if you have yes please, the schematic can attach to this forum?
Thanks.
Continue from Manoj page...
i'm using 47 ohm resistor for IRFB4227 @ 250Khz.but mosfets gets warm (50c) at 50w into 8 ohm load specially low side mosfet. (sine wave test). i just want to know what is the best value for IRFB4227 @ 250KHz
...i'm also don't using parallel diodes or HF reduction (R+C) for each mosfet.
specs of my D200 amp :
FSW set to 250KHz (with 47 Gate resistor and IRFB4227)
Supply volage +/- 58v (can deliver up to 1000w) + 34mF cap per rail.
Inductor : 70uH on T157-34 (it's get hot , but ok for this tests)
Output cap : 2*470nF 250v AC
also using external 12.8v for bias instead of BD241.
sound qulality and power is'nt bad , but clipping occurred at 60~70 nominal output specially at high frequency. mosfets get warm even in lower power like 20~50w.
Regards,
IRSound
i'm using 47 ohm resistor for IRFB4227 @ 250Khz.but mosfets gets warm (50c) at 50w into 8 ohm load specially low side mosfet. (sine wave test). i just want to know what is the best value for IRFB4227 @ 250KHz
...i'm also don't using parallel diodes or HF reduction (R+C) for each mosfet. specs of my D200 amp :
FSW set to 250KHz (with 47 Gate resistor and IRFB4227)
Supply volage +/- 58v (can deliver up to 1000w) + 34mF cap per rail.
Inductor : 70uH on T157-34 (it's get hot , but ok for this tests)
Output cap : 2*470nF 250v AC
also using external 12.8v for bias instead of BD241.
sound qulality and power is'nt bad , but clipping occurred at 60~70 nominal output specially at high frequency. mosfets get warm even in lower power like 20~50w.
Regards,
IRSound
Attachments
Continue from Manoj page...
i'm using 47 ohm resistor for IRFB4227 @ 250Khz.but mosfets gets warm (50c) at 50w into 8 ohm load specially low side mosfet. (sine wave test). i just want to know what is the best value for IRFB4227 @ 250KHz
specs of my D200 amp :
FSW set to 250KHz (with 47 Gate resistor and IRFB4227)
Supply volage +/- 58v (can deliver up to 1000w) + 34mF cap per rail.
Inductor : 70uH on T157-34 (it's get hot , but ok for this tests)
Output cap : 2*470nF 250v AC
also using external 12.8v for bias instead of BD241.
sound qulality and power is'nt bad , but clipping occurred at 60~70 nominal output specially at high frequency. mosfets get warm even in lower power like 20~50w.
Regards,
IRSound
Hi irsound
can i use T157-33 for class D output filter?
Hi Hadighorbani,
It's not anymore in production but i checked micrometals software and they're same with -34. so as i mentioned , it's not a good material because of high core loss. use -2 or other low loss iron powder toroidal cores.
also you can use ferrite cores with air gap but it's not as easy as toroidal ones. detex audio (IRS series amps designer) also using both toroidal and gaped ferrite cores , but i don't know specs of them.
Regards
It's not anymore in production but i checked micrometals software and they're same with -34. so as i mentioned , it's not a good material because of high core loss. use -2 or other low loss iron powder toroidal cores.
also you can use ferrite cores with air gap but it's not as easy as toroidal ones. detex audio (IRS series amps designer) also using both toroidal and gaped ferrite cores , but i don't know specs of them.
Regards
Attachments
TL081 and SN74HC00N manufacture by Texas Instruments and IR2110 manufacture by International Rectifiers, but there is many fake IR2110. Instead UF4007 I use BAV21 and outputs are IRF640N only warm at +/-75V and cold at +/-35V without heatsinks, I use gaped toroidal core PG0208 (made in China). BD241 and 2k2/2W are very hot at +/-75V, 2k2/2W can be replaced with 4k7/2W and BD241 must have heatsink.
Regards
Last edited:
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test :
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test - YouTube
so , as i mentioned before , my amp have temperature problem
in this video , i used 48uH (5x0.5mm wire) on two stacked CSC CK270060 , the core was warm about 30~40 °C in all tests.
the loudspeaker is a 16 Ohm full-range paralleled with a 8 ohm Electric resistance wire. mosfets get hot during this test as you can see up to 50 °C.
please help me...why mosfets gets hot
Regards,
IRSound
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test - YouTube
so , as i mentioned before , my amp have temperature problem
in this video , i used 48uH (5x0.5mm wire) on two stacked CSC CK270060 , the core was warm about 30~40 °C in all tests.
the loudspeaker is a 16 Ohm full-range paralleled with a 8 ohm Electric resistance wire. mosfets get hot during this test as you can see up to 50 °C.
please help me...why mosfets gets hot
Regards,
IRSound
Attachments
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test :
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test - YouTube
so , as i mentioned before , my amp have temperature problem
in this video , i used 48uH (5x0.5mm wire) on two stacked CSC CK270060 , the core was warm about 30~40 °C in all tests.
the loudspeaker is a 16 Ohm full-range paralleled with a 8 ohm Electric resistance wire. mosfets get hot during this test as you can see up to 50 °C.
please help me...why mosfets gets hot
Regards,
IRSound
Nice work, use heatsink for mosfets...
Regards
Hi
Could you send me the files of this amplifier?
I need to put together a good class D amplifier for use in my sound system PA
Thank you.
Hi
Could I send files from your amplifier D200 so I can build one?
I need to put together a good class D amplifier for use in my PA sound system.
Thank you.
luizcpimenta@yahoo.com.br
luizcpimenta@gmail.com
OMFG 500CClass-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test :
Class-D IRSound D200-V.0 Based On Apex D200 - a little music+ temperature test - YouTube
so , as i mentioned before , my amp have temperature problem
in this video , i used 48uH (5x0.5mm wire) on two stacked CSC CK270060 , the core was warm about 30~40 °C in all tests.
the loudspeaker is a 16 Ohm full-range paralleled with a 8 ohm Electric resistance wire. mosfets get hot during this test as you can see up to 50 °C.
please help me...why mosfets gets hot
Regards,
IRSound
Apenas fiz um comentario sobre a temperatura que o amplificador atingiu mas como assisti o video em baixa qualidade nao vi a virgula da casa decimal e pensei que fosse 550 C° desculpas
Last edited by a moderator:
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