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The TDAQ datasheet page 7 shows that its diagnostic output pin will be pulled low on an error condition e. I have a 12V battery and a boost converter so I can get intermediate voltages.
Components R1 series resistance and C5 capacitor between pin 7 and ground on the original TDA schematic are both required for correct behaviour.
The similar list of features might suggest that the implementation of the diagnostic output of the TDA may be similar to that in the TDAQ:. Sign up using Facebook. Post as a guest Name.
This site tda77379 Portugese is more complex. Do include R1 and C5. Both speaker terminals on both speakers, must be connected only to their respective pins on the IC.
You can also use your oscilloscope to carefully measure the voltages on the other TDA pins, while the IC is powered and an audio signal is connected, to confirm that the signal is definitely reaching the IC and that the voltages on the other pins seem reasonable for their function.
In this STA datasheet fromagain it confirms the interpretation of the output tva7379 the diagnostic pin see sections 6.
What can that diagnostic output tell us, and how does it do so? Below is an extract from the above STA datasheet which also confirms my earlier recommendation that ST-BY pin 7 must not be directly connected to the supply voltage. I have an oscilloscope available, do you recommend any tests? I found datasheets for two other similar audio amplifier ICs, which give more confidence in the interpretation of the diagnostic pin voltage mentioned above: Sign up or log in Sign up using Google.
Make sure not to connect any speaker terminal to “ground”. Therefore I believe that temporary connection to gather diagnostic information should be safe.
I found datasheets for two other similar audio amplifier ICs, which give more confidence in the interpretation of the diagnostic pin voltage mentioned above:. There wasn’t much information in that document also it says it’s a preliminary version and I couldn’t find a newer oneand I couldn’t make it work.
As you said, there is no information about using the signal on the “Diagnostic Output” pin 10 in the TDA datasheet. You might want to review their use of the IC, to see if you learn anything from them which is different from your usage of the IC: I also have a regulator so I can get 5V but I’m not using it for this circuit. Based on this diagram from the TDA datasheet: However, an earlier audio amplifier, part number TDAQ datasheet viewable via this webpage had a similar-sounding feature.
This would be my approach, but since I don’t have that IC, I cannot guarantee the results. It’s always possible that you might discover something: Tea7379 you ta7379 “[ For comparison, I found 2 website projects which use this IC. The input voltage tda73799 20V, input signal is about 0.
The current drain will be minimal on this rail, so no heatsink should be required. Yes, I double checked it.
You might want to review their use of the IC, to see if you learn anything from them which is different from your usage of the IC:. Alejandro Hda7379 2 6. Diagnostic pin You said: Is it required that you use 20V supply to the IC, as you mentioned, or can you use a lower voltage like 12 to 15V? I tried with two different chips, and after connecting STBY to VCC it starts to consume the correct quiescent current but there is no sound.
After some searching, I found an older audio amplifier which I hope has a similar diagnostic output, to give us a clue about how to use the diagnostic output of your TDA although this reverse-engineering is not guaranteed to be correct. Disconnect any inputs from the TDA