TDA7293V Mute/ST-BY Control Range for High Voltage Design

[DanielGouvea]

Dear Support Team,
I am planning to implement a circuit based on the TDA7293V. In this design, the IC will remain powered on, so I intend to use the circuit shown in Figure 6 (Single signal standby/mute control circuit) to prevent 'pop' noise. Given that my supply rails are ±44V (+Vs = +44V and -Vs = -44V), what is the recommended voltage range for the MUTE/ST-BY signal to ensure reliable operation?
Thanks in advance!! With warm regards, Daniel.

[Peter BENSCH · Accepted solution]

STBY and MUTE voltages of up to (+Vs)+|(-Vs)| can be applied, in your case 88V (referenced to Vs-) or 44V (referenced to GND).

However, since both inputs switch between a maximum of 1.5V (switch-on threshold) and a minimum of 3.5V (switch-off threshold), a control voltage referenced to Pin 1, typically GND, close to 0V is appropriate for the activated state and 4...5V for the deactivated state.

Does it answer your question?

Regards
/Peter

[DanielGouvea]

Yes, that perfectly answers my question! Thank you very much for the clear explanation.

It is great to know that the pins can safely handle the high voltage if needed, but I will configure my voltage divider to provide around 4.7V to 5V for the deactivated state and 0V for the activated state, exactly as you recommended.

I really appreciate your help!