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Class D Switching Power Amplifiers and Power D/A conversion

TDA7498E or Something Else?
TDA7498E or Something Else?
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Old 20th November 2019, 03:56 PM   #1
chienmort is offline chienmort
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Default TDA7498E or Something Else?

I have one of the red Sanwu boards and would like to use it for a speech Public Address system. The plan is to use it from a 12v leisure battery through a 12-36V DC-DC inverter.

Is there anything I should look out for or is there a better amp for this project, should also mention that quality is not that important and it will be used only intermittently.
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Old 20th November 2019, 05:05 PM   #2
denbret is offline denbret  Canada
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Hi, think added to the input of the amplifier a high-pass filter to avoid amplifying very low notes, like blows on the microphone. this in order to saturate the amplifier and speakers
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Old 20th November 2019, 05:07 PM   #3
chienmort is offline chienmort
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Quote:
Originally Posted by denbret View Post
Hi, think added to the input of the amplifier a high-pass filter to avoid amplifying very low notes, like blows on the microphone. this in order to saturate the amplifier and speakers
A good point. I like to see a 75Hz HPF on this type of input but had forgotten to add it to my block diagram.
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