TPA0211: SE mode.

Kengo.Y

Part Number: TPA0211

Hi team,

I'd like to know the Vo-pin status in SE mode.
According to the datasheet, it said the load is driven from one amplifier output (VO+, terminal 5).
Is the Vo- pin HiZ in SE mode?

Is there any sound coming from the speakers connected to Vo-pin?

Sincerely.
Kengo.

over 4 years ago

+1 Ivan Salazar over 4 years ago

TI__Guru** 114295 points

Hi Kengo,

There is no sound coming out of Vo- when the device is set to single-ended mode.
Most likely the negative output amplifiers are disconnected from the audio source in single-ended mode, or the bypass is disabled for these.

is there a specific use case you want to verify? There is an EVM available if you want to test the actual behavior.

Best regards,
-Ivan Salazar
Applications Engineer

0 Kengo.Y over 4 years ago in reply to Ivan Salazar

Guru 11405 points

Hi Ivan,

Thank you for your reply.

My customer was able to confirm that sound was produced depending on the connection method in Single-end mode.

1. There is a sound.

2.No sound.

3.There is a very small sound.

Are there any conditions for wiring to produce sound even in SE mode?

Sincerely.
Kengo.

0 Ivan Salazar over 4 years ago in reply to Kengo.Y

TI__Guru** 114295 points

Hi Kengo,

I'm not clear on what is the intention, does customer wants to get sound on Vo- even during SE mode?
If they want sound on both Vo- and Vo+, they should use BTL mode, if their intention is to use two separate output channels they will have inverted signals.

Best regards,
-Ivan Salazar
Applications Engineer

0 Kengo.Y over 4 years ago in reply to Ivan Salazar

Guru 11405 points

Hi Ivan,

Thank you for your reply.

You said Vo- was disconnected from the audio source or the bypass is disabled in SE mode.
In the circuit of No3, a small voltage(Vo+ * 1/20) is output from Vo-.
Vo- was disconnected from the audio source, so is this voltage leaking?

Sincerely.
Kengo.

+1 Ivan Salazar over 4 years ago in reply to Kengo.Y

TI__Guru** 114295 points

Hi Kengo,

Most likely this voltage is leaking from the input through the feedback resistors in the Vo- path.

Best regards,
-Ivan Salazar
Applications Engineer

Audio

Audio forum

TPA0211: SE mode.