TI TPA3100D2, Amazing Class D Amp - Page 3

theAnonymous1 · 22nd August 2012, 05:44 PM

Thanks for the offer, but I wouldn't be able to offer any useful input on it. I'm admittedly not an audiophile and there would have to be a serious flaw in the design for it to sound any different to me than the other dozen amps I have sitting around.

kp93300 · 23rd August 2012, 02:06 AM

[QUOTE=wushuliu;3136022]The RCAs are a problem. Maybe someone can figure it out: They have differential inputs with jumpers by them for unbalanced. I have no idea what balanced rca's exist that could be used in the first place. Anyway, I tried to bypass the rca inputs but nothing worked. I tried to solder connections directly to the pads which normally works fine but there is something to how the differential input is set up that I am missing because nothing works. So I have to plug an rca into the jacks and run wires from the plugs to the chassis inputs, creating an unneeded extra connection.

If someone can explain how to avoid having to use the stock rca that would be great.

HI Wushuliu,
Can you elaborate on the rca input.
What is a differential input ? How do you manage to get the sound with the standard rca input ?
Would be nice if you can post a picture of the rca input in your set up >.
Anybody planning to make a pcb for this chip ?
thanks

kp93300

wushuliu · 23rd August 2012, 02:27 AM

The board has jumpers for standard rca. The development board pdf in the first post has pics so you can see the jacks and explains differential input.

lol I don't think this thread has generated enough attention to have anyone rushing to make a pcb yet.

theAnonymous1 · 02:34 AM

LINN and RINN have to be grounded for unbalanced inputs; that's what jumpers J9 and J10 are for. Make sure J14 is not in place.

theAnonymous1 · 23rd August 2012, 02:34 AM

A couple people have made PCB's for the TPA3106D1. I still personally prefer that IC over the 3100D2 for thermal dissipation reasons, but the 3100D2 will obviously make an easier PCB layout.

kp93300 · 23rd August 2012, 02:41 AM

I post the schematic from the application manual

thanks for the tip

fakeout · 25th August 2012, 12:03 AM

Any word on whether the bass is shallow?

fakeout · 28th August 2012, 09:41 PM

I don't know about you people but I find this whole chip amp business confusing. First, I read that STMicroelectronics TDA7492 is allegedly superior then I read the TK2050 is superior...

theAnonymous1 · 29th August 2012, 03:06 AM

Quote:

Originally Posted by fakeout

I don't know about you people but I find this whole chip amp business confusing. First, I read that STMicroelectronics TDA7492 is allegedly superior then I read the TK2050 is superior...

Welcome to the world of subjective opinions.

kp93300 · 12:15 AM

I bought the evaluation board and powered with a 12 V SLA last night.. I tried it with and without buffer and Buffalo 2 dac . My speaker is 91db efficient and has it own powered woofer.
I listen for about 1 hr. The impression may not hold later. with run in.
Compared to my modded Trend audio 10.1, the bass and high is lacking.

Hi Wushuliu, what is the size of the power supply caps and input coupling caps in TBI ??
What is the power supply V in in the TBI?

thanks

kp93300

22nd August 2012, 05:44 PM	#21
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Thanks for the offer, but I wouldn't be able to offer any useful input on it. I'm admittedly not an audiophile and there would have to be a serious flaw in the design for it to sound any different to me than the other dozen amps I have sitting around. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

23rd August 2012, 02:29 AM	#24
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	LINN and RINN have to be grounded for unbalanced inputs; that's what jumpers J9 and J10 are for. Make sure J14 is not in place. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja Last edited by theAnonymous1; 23rd August 2012 at 02:34 AM.

23rd August 2012, 02:34 AM	#25
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	A couple people have made PCB's for the TPA3106D1. I still personally prefer that IC over the 3100D2 for thermal dissipation reasons, but the 3100D2 will obviously make an easier PCB layout. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

25th August 2012, 12:03 AM	#27
fakeout diyAudio Member Join Date: Feb 2012	Any word on whether the bass is shallow? __________________ Feeling Good by David Burns

28th August 2012, 09:41 PM	#28
fakeout diyAudio Member Join Date: Feb 2012	I don't know about you people but I find this whole chip amp business confusing. First, I read that STMicroelectronics TDA7492 is allegedly superior then I read the TK2050 is superior... __________________ Feeling Good by David Burns


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23rd August 2012, 02:06 AM	#22
kp93300 diyAudio Member Join Date: Mar 2007	[QUOTE=wushuliu;3136022]The RCAs are a problem. Maybe someone can figure it out: They have differential inputs with jumpers by them for unbalanced. I have no idea what balanced rca's exist that could be used in the first place. Anyway, I tried to bypass the rca inputs but nothing worked. I tried to solder connections directly to the pads which normally works fine but there is something to how the differential input is set up that I am missing because nothing works. So I have to plug an rca into the jacks and run wires from the plugs to the chassis inputs, creating an unneeded extra connection. If someone can explain how to avoid having to use the stock rca that would be great. HI Wushuliu, Can you elaborate on the rca input. What is a differential input ? How do you manage to get the sound with the standard rca input ? Would be nice if you can post a picture of the rca input in your set up >. Anybody planning to make a pcb for this chip ? thanks kp93300

23rd August 2012, 02:27 AM	#23
wushuliu diyAudio Member Join Date: May 2008 Location: Los Angeles	The board has jumpers for standard rca. The development board pdf in the first post has pics so you can see the jacks and explains differential input. lol I don't think this thread has generated enough attention to have anyone rushing to make a pcb yet.

30th August 2012, 12:14 AM	#30
kp93300 diyAudio Member Join Date: Mar 2007	I bought the evaluation board and powered with a 12 V SLA last night.. I tried it with and without buffer and Buffalo 2 dac . My speaker is 91db efficient and has it own powered woofer. I listen for about 1 hr. The impression may not hold later. with run in. Compared to my modded Trend audio 10.1, the bass and high is lacking. Hi Wushuliu, what is the size of the power supply caps and input coupling caps in TBI ?? What is the power supply V in in the TBI? thanks kp93300 Last edited by kp93300; 30th August 2012 at 12:15 AM. Reason: add questions

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