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Class D Switching Power Amplifiers and Power D/A conversion

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Old 17th June 2010, 02:01 PM   #231
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Location: Rome, Italy
Another question for hifimediy: is the output related to the input non-inverting?
(you can value the question here: 6moons audio reviews: Winsome Labs Mouse)
Thanks, bye!
PS: I'm very interested in your board so I'm asking every detail to you!
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Old 17th June 2010, 07:32 PM   #232
glt is offline glt  United States
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Quote:
Originally Posted by Nick122147 View Post
Another thing necesary for run at low voltages:
Bypass the relay and also lower the value of R27 which is near the LM7805. Bypass R27 for 12V
Nick122147,

Thanks for all the info. As the application is for a portable mono-channel PA, can the two channels be "used in parallel" for more power? I guess the question is "how to turn the stereo configuration into a mono configuration with more power"
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Old 17th June 2010, 11:51 PM   #233
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Quote:
Originally Posted by glt View Post
Nick122147,

Thanks for all the info. As the application is for a portable mono-channel PA, can the two channels be "used in parallel" for more power? I guess the question is "how to turn the stereo configuration into a mono configuration with more power"
I think that's not possible:
"The board can not be bridged to make 200W mono. This is because the tp2050 is already paralleled on this board." (from the ebay auction)
Bye!
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Old 18th June 2010, 03:13 AM   #234
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Location: Shanghai
Quote:
Originally Posted by Don Jerry View Post
Another question for hifimediy: is the output related to the input non-inverting?
(you can value the question here: 6moons audio reviews: Winsome Labs Mouse)
Thanks, bye!
PS: I'm very interested in your board so I'm asking every detail to you!
In the review the maker writes:

"In fact, the TP2050 is really a Tripath-branded STI Microsystems STA-505"

Does that mean they are identical?

About the non-inverting: I myself think that is not possible to hear. If you move your ears 0,01 mm closer to the speakers you will hear the non-inverted signal. (just a guess
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Old 18th June 2010, 05:50 AM   #235
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Quote:
Originally Posted by Nick122147 View Post
In the review the maker writes:

"In fact, the TP2050 is really a Tripath-branded STI Microsystems STA-505"

Does that mean they are identical?

About the non-inverting: I myself think that is not possible to hear. If you move your ears 0,01 mm closer to the speakers you will hear the non-inverted signal. (just a guess
Nope , You have to mount the driver inside out, To hear the non-inverted sound, LOL
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Old 18th June 2010, 03:02 PM   #236
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Quote:
Originally Posted by SoldierAnt76 View Post
Are the Tripath chips still being manufactured? I know the IP was bought by another company, but it's never been clear (to me, anyway) where all these chips come from.
Many chips have stock on the market we can still buy. And some one like me will have own stock.
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Old 18th June 2010, 03:11 PM   #237
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Quote:
Originally Posted by Don Jerry View Post
Hifimediy, have you got some news about the coils issue?
Did you do some test with different coils to determine if there are audible differences?
Thanks, bye!!
hi, the coils we used one v2.0 now is type -2, which is suggested on the application note of Tripath. other coils may works but not good enough, some may lead to high temperature or even burn.
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Old 18th June 2010, 03:13 PM   #238
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Join Date: Oct 2009
Quote:
Originally Posted by Don Jerry View Post
Another question for hifimediy: is the output related to the input non-inverting?
(you can value the question here: 6moons audio reviews: Winsome Labs Mouse)
Thanks, bye!
PS: I'm very interested in your board so I'm asking every detail to you!
yes it's non-inversting. thanks/
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Old 18th June 2010, 03:16 PM   #239
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Join Date: Oct 2009
Quote:
Originally Posted by Don Jerry View Post
I think that's not possible:
"The board can not be bridged to make 200W mono. This is because the tp2050 is already paralleled on this board." (from the ebay auction)
Bye!
Right. we have to choose another power stage IC for 200W use.
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Old 18th June 2010, 03:32 PM   #240
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Join Date: Oct 2009
Thanks for all suggestions. here are new ways to tight the heatsink.
[IMG]Click the image to open in full size.2050 heatsink improvement[/IMG]
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