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Old 14th April 2009, 08:24 PM   #1
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Default TDA7386 Problem

I try to build the circuit using the TDA7386. I tought I had recriated the schematic provided on datasheet, but ir didnt work...


I let the for you to can help me.


Please Help me
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Old 14th April 2009, 08:51 PM   #2
mjf is offline mjf  Austria
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hello.
i think you have reverted tab and svr - tab goes to ground and svr needs the elcap..................
greetings.....
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Old 14th April 2009, 08:54 PM   #3
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At first glance it seems that the 47 µF capacitor is at the wrong pin. It should be connected to pin 10, but you connected it to pin 25.
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Old 14th April 2009, 09:02 PM   #4
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Quote:
Originally posted by mjf
hello.
i think you have reverted tab and svr - tab goes to ground and svr needs the elcap..................
greetings.....

Thanks.. but is that enough to make the circuit not to work???


Thanks again
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Old 15th April 2009, 06:32 AM   #5
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Yes, because the SVR pin controls the on/off delay. It is charged through the TDA, and the amplifier turns on, when the capacitor is charged to a certain voltage. If you force that pin to ground, the amplifier will remain off.
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Old 15th April 2009, 06:39 AM   #6
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OK. Thanks a lot....

And what about mute and stby?


thanks
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Old 15th April 2009, 06:32 PM   #7
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Mute and Standby should turn on after the amplifier. The datasheet application you are using is surely designed accordingly.
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