Lm3875 + Tip35c/tip36c

JojoD818 · 23rd December 2003, 04:14 PM

Hi everyone,

I saw a sub amp using an LM3875 with TIP35C/TIP36C as outputs. Has anyone tried this? Can you please point me to a schematic?

Thanks in advance,

Best Regards,
JojoD

paulb · 23rd December 2003, 07:16 PM

Try searching around here, I know I've seen one somewhere but don't know how long ago.

JojoD818 · 24th December 2003, 01:39 AM

paulb,

I have searched but can't find anything about it in here.

If there is anyone who remembers it please point me in the right direction.

Thanks,
JojoD

JojoD818 · 26th December 2003, 12:18 AM

Anyone? PLease? It doesn't have to be exactly an Lm3875 and TIP35c/36c combo.

JojoD

Kay · 26th December 2003, 12:39 AM

Look for the datasheet from UTC for the TDA2030

http://www.unisonic.com.tw/spec/UTC%20TDA2030A.pdf

You will see a circuit, maybe the same you see with 3875

JojoD818 · 26th December 2003, 04:15 AM

Hi Kay,

I built that just now. However, the chipamp is warm but the transistors are not even warm. I used MJ15003/4 pair for the output. If you have any other ideas on such a project, please inform me.

Thanks,
JojoD

djk · 26th December 2003, 08:43 AM

http://www.mif.pg.gda.pl/homepages/t...s/simp200W.gif

This circuit with an 80V supply and the National Semiconductor LM3886/whatever, will drive 400W/4R with MJ15003/04. If you want to use plastic TIP35/36 use twice as many.

Matttcattt · 26th December 2003, 09:52 AM

Quote:

Originally posted by djk
http://www.mif.pg.gda.pl/homepages/t...s/simp200W.gif

This circuit with an 80V supply and the National Semiconductor LM3886/whatever, will drive 400W/4R with MJ15003/04. If you want to use plastic TIP35/36 use twice as many.

i assume you mean you mean +/-40.

li_gangyi · 26th December 2003, 10:24 AM

this is pretty interesting...haven used a GC chip this way...I'll try it out soon and let you guys know hat I used and what's the performance like...but has anyone actually done it???

Dxvideo · 26th December 2003, 11:34 AM

Can we use that circuit with one LM1876 and two MJ3055+MJ2955? And does it give 200W RMS to 4ohm?

And the final question; does the SOAR work in this situation?

23rd December 2003, 04:14 PM	#1
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: diyAudio Special Operations Center	Lm3875 + Tip35c/tip36c Hi everyone, I saw a sub amp using an LM3875 with TIP35C/TIP36C as outputs. Has anyone tried this? Can you please point me to a schematic? Thanks in advance, Best Regards, JojoD

26th December 2003, 12:18 AM	#4
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: diyAudio Special Operations Center	Bump... Anyone? PLease? It doesn't have to be exactly an Lm3875 and TIP35c/36c combo. JojoD

26th December 2003, 12:39 AM	#5
Kay diyAudio Member Join Date: Nov 2001 Location: Osnabrueck (Germany)	Look for the datasheet from UTC for the TDA2030 http://www.unisonic.com.tw/spec/UTC%20TDA2030A.pdf You will see a circuit, maybe the same you see with 3875 __________________ best regards Kay

26th December 2003, 10:24 AM	#9
li_gangyi diyAudio Member Join Date: Jun 2003 Location: Woodlands Circle	this is pretty interesting...haven used a GC chip this way...I'll try it out soon and let you guys know hat I used and what's the performance like...but has anyone actually done it??? __________________ Kids in the back seat cause accidents...Accidents in the back seat cause kids...

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23rd December 2003, 07:16 PM	#2
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	Try searching around here, I know I've seen one somewhere but don't know how long ago.

24th December 2003, 01:39 AM	#3
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: diyAudio Special Operations Center	paulb, I have searched but can't find anything about it in here. If there is anyone who remembers it please point me in the right direction. Thanks, JojoD

26th December 2003, 04:15 AM	#6
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: diyAudio Special Operations Center	Hi Kay, I built that just now. However, the chipamp is warm but the transistors are not even warm. I used MJ15003/4 pair for the output. If you have any other ideas on such a project, please inform me. Thanks, JojoD

26th December 2003, 08:43 AM	#7
djk diyAudio Member Join Date: Feb 2001 Location: USA	http://www.mif.pg.gda.pl/homepages/t...s/simp200W.gif This circuit with an 80V supply and the National Semiconductor LM3886/whatever, will drive 400W/4R with MJ15003/04. If you want to use plastic TIP35/36 use twice as many.

26th December 2003, 11:34 AM	#10
Dxvideo diyAudio Member Join Date: Nov 2003 Location: Turkey	Can we use that circuit with one LM1876 and two MJ3055+MJ2955? And does it give 200W RMS to 4ohm? And the final question; does the SOAR work in this situation?

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