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Old 15th February 2013, 08:29 PM   #161
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Quote:
Originally Posted by tabarddn View Post
Hi Sorry KP cannot get a good photo of the board. But the ones on Ebay are quite good.
Anyway I have finished my evaluation of the two TI boards I have and found that the sound from both is very good and I could happily live with either of them.
That said I believe that the Texas TPA3116D2 stereo 50 watts coming out on top with definitely a better base line and in an orchestral piece the instruments are better layered than that of the TI TPA3123 board. In saying that however I was surprised that to my ears at least the dual mono bridges TI TPA3123 seemed to go louder that the 3116 amp. But both are well loud enough to satisfy anyone accept for maybe “Petrol Heads”
Interestingly though I have managed to find a commercial release of the 3116 board at last on Taobao. And fortunately I have a friend who has an account with them so I have asked her to purchase one for me. It’s layout looks like it is a perfect clone on the original TI evaluation board.
Good to know. Thanks for reporting back.
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Old 16th February 2013, 12:28 AM   #162
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Quote:
Originally Posted by tabarddn View Post
Hi Sorry KP cannot get a good photo of the board. But the ones on Ebay are quite good.
Anyway I have finished my evaluation of the two TI boards I have and found that the sound from both is very good and I could happily live with either of them.
That said I believe that the Texas TPA3116D2 stereo 50 watts coming out on top with definitely a better base line and in an orchestral piece the instruments are better layered than that of the TI TPA3123 board. In saying that however I was surprised that to my ears at least the dual mono bridges TI TPA3123 seemed to go louder that the 3116 amp. But both are well loud enough to satisfy anyone accept for maybe “Petrol Heads”
Interestingly though I have managed to find a commercial release of the 3116 board at last on Taobao. And fortunately I have a friend who has an account with them so I have asked her to purchase one for me. It’s layout looks like it is a perfect clone on the original TI evaluation board.
Fully assembled amplifiers featuring Texas Instruments chips seem fairly rare. I did notice 3 units available featuring the TPA3123. You can get the Muse Audio M50 or M50 Ex, the Guanzo DP-101, or the FEI XIANG FX502A. Does anyone know which one might be preferred or which one is built with the better parts with better build quality? They are all roughly the same price. Anyway, these are 3 more toys on the Texas Instruments pile to try out.
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Old 16th February 2013, 12:38 AM   #163
kp93300 is offline kp93300  Malaysia
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Hi tabarddn
thanks for the feedback. Have you mod it already.?
I have placed an order for the 50W BTL TI TPA 3123 also.
cheers
kp93300
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Old 16th February 2013, 02:08 AM   #164
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Hi KP, No have done no mod's. I am no good at this side of things. I am a mechanical eng. (our brains work differently to electronic engineers!!)
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Old 16th February 2013, 04:17 AM   #165
DUG is offline DUG  Canada
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My TPA3116 at the Toronto meet:

Greater Toronto Area DIY meetup

pix # ...1603 in post 230

On the left is 2 ch on the right is configured for single subwoofer.

I think it sounded great...(but it is my amp)

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Old 16th February 2013, 04:52 AM   #166
xrk971 is online now xrk971  United States
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Dug,
Those little amps look great! Did you make the boards yourself? I just ordered the TPA3118D2 chips and will need to figure out how to mount it with no board. I also have the 3116D2, 3130D2 and they came today. Boy they are small! I am just reading up on SMD soldering techniques. It's a little intimidating for someone who has only made thru hole circuits in the past.
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Old 16th February 2013, 01:16 PM   #167
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TI's circuit straight from the data sheet.

My board design, my soldering (by hand)

Small secret (not now though): I made a clamp to hold them in place before soldering.
That way the heat sink does not stress them when installed and they don't move when being soldered.

Use magnifying goggles, a very small soldering iron tip, thin solder, and liquid flux.
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Old 16th February 2013, 01:33 PM   #168
xrk971 is online now xrk971  United States
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Dug,
Wow those look beautiful, you do some really nice work there. Amazing to think that this little thing pumps out 50 watts/ch! Is this the base circuit from the part spec sheet and not the eval board circuit?
Regards,
X

Last edited by xrk971; 16th February 2013 at 01:35 PM.
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Old 16th February 2013, 01:55 PM   #169
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Data sheet fig 27

This one configured as sub driver...same board
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Old 16th February 2013, 02:26 PM   #170
xrk971 is online now xrk971  United States
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Dug,
Did you use bigger inductors than 10 uH for the subs because they look different? Spec sheet circuit calls for same - but I guess if you intend to use it to drive sub, making it bigger gives cleaner rwponse at expense of high freq response.
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