My TDA7293 project... please help

[JojoD818]

Hi everyone,

I need your help again guys. I am designing a pcb for the TDA7293 chipamp and I have a few questions so far.... (I don't want to end up burning the chip) 🙂

In the schematic,
1. What is the working voltage of C5 (22uf Bootstrap Capacitor)
2. How do I implement the use pin 5 (Clip Detect)?

Planned psu is +/-50V @ 10A.

Thank you in advance!

Regards,
JojoD

 

[JojoD818]

Schematic

Schematic Diagram that I use for evaluation/prototype from the datasheet.

 

[Cradle22]

Hi!

Take a look at this document (in German, but the circuit and PCB details might be very helpfulk):

A100 TDA7293 amp

According to this, and the parts description on Schuro.de, you should use a 25V - 63V cap for C5 (C7 in the A100 circuit).

I cannot help you with clipping detection, since the designer of the A100 chose to omit it...

Hope this helps,

Arndt

 

[JojoD818]

thanks!

 

[Saif Bin Azad]

Hi!
I wanna make a Bridge TDA7293 200watt subwoofer amplifier with a low pass filter by TL074 with bass control and volume control. Please can anyone send me a pcb and shametic circuit diagram of such amplifier? Thanks.

 

[reji]

Hi!
I wanna make a Bridge TDA7293 200watt subwoofer amplifier with a low pass filter by TL074 with bass control and volume control. Please can anyone send me a pcb and shametic circuit diagram of such amplifier? Thanks.

 

[nigelwright7557]

Make sure those 100nf decoupling capacitors are as close to 7293 power pins as possible.
I had trouble with mine oscillating on the output.

 

[nigelwright7557]

The feedback resistor needs to be as close to chip as possible.
Mine was a fair distance away and the chip oscillated.