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Chip Amps Amplifiers based on integrated circuits

TDA7294
TDA7294
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Old 16th July 2019, 10:06 PM   #1
invaderzim is offline invaderzim  United States
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Default TDA7294

Any comments good or bad on this design?
Amplifier audio TDA7294 AMP MULTI ~ 100-200W (stereo or bridge) \ Усилитель мощности звука - Share Project - PCBWay
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Old 16th July 2019, 10:22 PM   #2
rayma is online now rayma  United States
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Quote:
Originally Posted by invaderzim View Post
Any comments good or bad on this design?
With the values shown, the input impedance is a very low 1k.
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Old 16th July 2019, 10:23 PM   #3
invaderzim is offline invaderzim  United States
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Quote:
Originally Posted by rayma View Post
With the values shown, the input impedance is a very low 1k.
Yikes, glad I asked. Thanks.
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Old 17th July 2019, 12:24 AM   #4
nigelwright7557 is offline nigelwright7557  United Kingdom
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Very poor op amp front end.
The capacitor should have a resistor in front of to make a low pass filter.
Then 1k input impedance followed by a 100k resistor which does nothing.
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Old 18th July 2019, 03:12 PM   #5
invaderzim is offline invaderzim  United States
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Quote:
Originally Posted by nigelwright7557 View Post
Very poor op amp front end.
The capacitor should have a resistor in front of to make a low pass filter.
Then 1k input impedance followed by a 100k resistor which does nothing.
Thank you for the input. I'll keep looking for an 'inexpensive' project.
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Old 23rd July 2019, 07:21 AM   #6
Astaro is offline Astaro  Russian Federation
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The best Board design of the amplifier based on TDA7293. One channel - Share Project - PCBWay
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Old 30th July 2019, 09:14 PM   #7
nigelwright7557 is offline nigelwright7557  United Kingdom
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Much better front end.
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Old 30th July 2019, 09:18 PM   #8
invaderzim is offline invaderzim  United States
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thanks!
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