1500W RMS Class D PCB - which Class D Driver Chip is it ?

mosfetsound · 24th October 2008, 02:57 AM

Hello,

I have here 2 working Class D PCBs, Output Power is about 1600W RMS@4 OHM, Rail Voltage is 150V

IC Manufacturer is removed, does everybody know this Driver Device ?

This Class D Amplifier is Full Bridged and has 8 pcs. IRFP250N Output Devices each Channel

Sound is very very good powerful bass....

Workhorse · 24th October 2008, 01:28 PM

Flatpak SMT IR2113

Eva · 24th October 2008, 02:03 PM

Are you sure that four 123nC MOSFET may be optimally driven with just an IR2113? Maybe with an IR2010? I'm in doubt... Is it a full range amplifier? Judging by the size of the output inductor, switching frequency should be pretty high.

Anyway, it seems like a year 2007 design yet they are still stuck with junk like IRFP250N. For example, a single pair of a certain recent TO-220 model can do the work of 3 pairs of IRFP250N.

Also, being a 150V full bridge, it should produce nearly 2500W at 4 ohms, not 1500W which requires just a bit over 100V. But with such a small output inductor, saturation current can't be very high either...

Workhorse · 24th October 2008, 02:25 PM

IR2113/2110 are different only on basis of max voltage ratings i.e. 600/500V respectively, rest ratings are similar.

I have tried IR2113 with a pair of IRFP250N with rails at +/-80V and SW=220kHz with no prob.

Though i have stopped using IR chips, i prefer TC4420

Eva · 24th October 2008, 02:28 PM

I meant IR2010. The problems are IC heating and delay, of course.

Workhorse · 24th October 2008, 02:31 PM

Yeah, only if that chip is IR2010.

qsa · 24th October 2008, 07:22 PM

I have here a schematic from Class D amplifier, but there is one another big IC, does anybody have idea which device ?

Ops are LM393, MC74HC04, 339 = ?

but this IC ?

ppnoraseng · 19th February 2010, 12:51 PM

qsa schematic is unreadsable

theAnonymous1 · 01:37 PM

Are you sure those aren't MOSFET drivers like IX6R11S3?

AP2 · 19th February 2010, 07:03 PM

Hi,
project looks very good.
2 IRFP250 for side ... it is a bit heavy to driving for IR21xx...I think.

24th October 2008, 01:28 PM	#2
Workhorse diyAudio Member Join Date: Dec 2004 Location: ḺΛβ	Flatpak SMT IR2113 __________________

24th October 2008, 02:03 PM	#3
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Are you sure that four 123nC MOSFET may be optimally driven with just an IR2113? Maybe with an IR2010? I'm in doubt... Is it a full range amplifier? Judging by the size of the output inductor, switching frequency should be pretty high. Anyway, it seems like a year 2007 design yet they are still stuck with junk like IRFP250N. For example, a single pair of a certain recent TO-220 model can do the work of 3 pairs of IRFP250N. Also, being a 150V full bridge, it should produce nearly 2500W at 4 ohms, not 1500W which requires just a bit over 100V. But with such a small output inductor, saturation current can't be very high either... __________________ I use to feel like the small child in The Emperor's New Clothes tale

24th October 2008, 02:25 PM	#4
Workhorse diyAudio Member Join Date: Dec 2004 Location: ḺΛβ	IR2113/2110 are different only on basis of max voltage ratings i.e. 600/500V respectively, rest ratings are similar. I have tried IR2113 with a pair of IRFP250N with rails at +/-80V and SW=220kHz with no prob. Though i have stopped using IR chips, i prefer TC4420 __________________

24th October 2008, 02:28 PM	#5
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	I meant IR2010. The problems are IC heating and delay, of course. __________________ I use to feel like the small child in The Emperor's New Clothes tale

24th October 2008, 02:31 PM	#6
Workhorse diyAudio Member Join Date: Dec 2004 Location: ḺΛβ	Yeah, only if that chip is IR2010. __________________


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19th February 2010, 12:51 PM	#8
ppnoraseng diyAudio Member Join Date: Jul 2008	qsa schematic is unreadsable

19th February 2010, 01:31 PM	#9
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Are you sure those aren't MOSFET drivers like IX6R11S3? __________________ "If you don't like funerals don't kick sand in ninja's face." Last edited by theAnonymous1; 19th February 2010 at 01:37 PM.

19th February 2010, 07:03 PM	#10
AP2 diyAudio Member Join Date: Dec 2009 Location: Italy	Hi, project looks very good. 2 IRFP250 for side ... it is a bit heavy to driving for IR21xx...I think.

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