Help with TDA7492

[mocanu12]

On amp manual it says to use voltage between 9 - 20 and it says the recommend voltage is 12 3A

 

[FauxFrench]

On amp manual it says to use voltage between 9 - 20 and it says the recommend voltage is 12 3A

Yes but as far as I understand, you haven't got a 12V/3A supply?

 

[mocanu12]

I have a power supply 12v/2A .
But i want to use this speaker portable , i have all assambled

 

[FauxFrench]

I have a power supply 12v/2A .
But i want to use this speaker portable , i have all assambled

I understand but until it works you may need to use the 12V/2A supply. If you continue without changes it is likely to work as before. Is it that difficult to use the 12V/2A for a couple of days?

 

[mocanu12]

No

If i discarge the battery , then charge to full after it will work normal?

 

[FauxFrench]

If it is a lithium-based battery it should not be necessary to discharge it, only disconnect it and prevent (wrap plastic around the electrical terminals) it from getting in electrical contact with the 12V/2A power supply. NiCd batteries liked deep-cycling, not lithium batteries.

 

[mocanu12]

You say to disconnect power from batteryes to amp?

 

[chermann]

Hi

FF said that its important that you use a "better/stronger" power supply to check your amp. the stronger e.g. 19V/3-4A should avoid the under voltage protection of the amp....these modern chips check the voltage at their power rails-that means if your weak battery voltages goes lower then this threshold the amp shuts down.

please look for a better power supply -then FF/we can help you...

chris

 

[mocanu12]

This amp work for a mounth with no problems.

 

[FauxFrench]

With the 12V supply the TDA7492 amplifier work without problems, correct?
If so, we have to figure out what to do about the batteries.

 

[mocanu12]

Yeah work perfectly, i think i short circuit the amp because in one day one wire from the bms was cut out and when I solder it on bms I didn't remove the jack from amp input power

 

[FauxFrench]

So now it works even with the battery?

 

[mocanu12]

now is not working with bateries and power suply

 

[FauxFrench]

You really mean not working?

 

[mocanu12]

I test with the bateries , power suply 12v/2A and no sound , but the phone connect to amp

 

[FauxFrench]

Did you try to push the buttons?

 

[mocanu12]

yes

 

[FauxFrench]

Try to measure the voltage from each of the 4 output lines and to "-" (minus) supply. If the chip is being deactivated, the 4 output lines should have little voltage.

 

[mocanu12]

something else could i try , i dont have right now a multimeter i need to buy one

 

[FauxFrench]

Yes, please check all your connections. Multimeters cost very little and you cannot do DIY-electronics without a multimeter.