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Chip Amps Amplifiers based on integrated circuits

TDA2008 and TDA2003: same PCB ?
TDA2008 and TDA2003: same PCB ?
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Old 18th October 2018, 08:50 PM   #11
Peters8 is offline Peters8  Italy
diyAudio Member
 
Join Date: Sep 2014
Thank MJF!
I've already read the TDA2008 datasheet, but, since I'm a newbie, I've still have some dubt.
For this reason I've asked for your help.

Best regards
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Old 18th October 2018, 09:56 PM   #12
meik65 is offline meik65  Germany
diyAudio Member
 
Join Date: Mar 2013
Hi,

as you can read in the datasheet the frequency response of the circuits is 40 Hz to 15 kHz
which isn`t up to date, they were designed for Lo-Fi use in cars or cheap cassette recorders. The output capacitor together with the 4 or 8 Ohm speaker are building a high pass filter to reproduce a frequency of 40Hz you need a capacitor of 950uF with a 4 Ohm speaker or a cap of 500 uF with a 8 Ohm speaker. That means a 1.000uF as in the datasheet will do the job.To have a little headroom and prevent aging issues you can use 2.200uF but 8.200uF doesn't make sense the circuits aren't capable of reproducing this low frequency on the output. I fyou only want to play around with the board using the TDAs is OK, but there are much better integrated amps to buy for little money , i.e. LM3886 or TDA7497 both classic AB amps and not class D.
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Old 19th October 2018, 03:29 AM   #13
Peters8 is offline Peters8  Italy
diyAudio Member
 
Join Date: Sep 2014
Thank you Meik65!
Your help is very precious to me!
Regards
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