Audio codec line out

Hello Chin, 

Our team is looking into this and will respond as soon as possible. 

Best Regards, 

Justin Beigel

Hi Chin,

Can you provide further description of your required system? You want to take a differential signal input into a single-ended output? Devices like DRV632 may be useful for this.

However you mention Audio codec, do you need digital audio interface?

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan,

Thanks for your answer. Attached is our block diagram of Audio system. Refer to the block diagram, could you please provide the suitable TI solutions to us ? Thanks!

1. Audio codec --- Need Linux kernel 4.4 supported.

2. Amplifier ---Class-D 5W@ 8ohm. Amplifier output must be short-circuit protected.

3. Single-end to differential converter.

4. Differential to single-end converter.

5. Driving buffer (see the yellow color int he block diagram).

6. In the block diagram, there are two voice source inputs (see the blue color)  connect to Line_in_L+/-. Does TI have solution to do such

    design ? I worry about if directly connect both sources (voice source 1 and voice source 3) to Line_in_L+- and  without any circuit, maybe

     we  will meet audio issue in this kind of connection.

Thank you for your help!

Sincerely,

Chin

Audio_TI.pdf

Hi Chin,

Let me comment below:

1. You can check our audio converter portfolio, although I'm still not clear on this one. You don't need digital audio interface but need digital control for the different audio paths? Here is the audio converter portfolio: Audio Converters l Overview l Audio l TI.com
2. Depending on the available supply voltages you could use a booster amplifier using 5V supply or other higher voltage range amplifier from 12V or similar. Speaker Amplifiers | Class-D | Overview | Audio | TI.com
3. You may use a line receiver: Audio Line Receivers | Products | Audio | TI.com
4. And a line driver here: Audio Line Drivers | Products | Audio IC | TI.com
5. Most likely you don't need a buffer. Only if need to convert from current to voltage, or signal is too low, you may use an op amp: Audio Op Amp | Overview | Operational Amplifiers | TI.com
6. I would expect that single-ended to differential would be enabled/disabled as needed, if not able to make sure only one source is enabled at a time you could consider audio switches: Audio Switches | Products | Audio | TI.com

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan,

Thanks for your answer.

About Audio codec , I checked the TI portfolio and I think TLV320AIC3104 can meet our block diagram requirement.(We also need AGC function) . I would like to know , does TLV320AIC3104 can be supported in Linux kernel 5.10.9 ? software driver ready ? Our platform is embedded Linux system.

Thanks!

Chin

Hi Chin,

Let me check on the supported versions for this device. Will provide some updates tomorrow or Monday night.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Chin,

Please refer to this site for driver details: TLV320AIC3XSW-LINUX Driver or library | TI.com

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan,

Okay, Thank for your information!

By the way, We decide to design TPA3113D2 to drive our Mono speaker (5W/8ohm).

Following questions need your help to answer.

1. If our audio source is Mono input, can we connect just only one channel (Left_in and Left _out) to fit our requirement ? or We have to connect

    as PBTL architecture (Figure 39 of datasheet) ?

2. Which efficiency table can be referenced if we design Mono speaker ?

Thanks!

Sincerely,

Chin

Hi Chin,

Please start a new thread for TPA3113D2 as it belongs to a different team, this way the responsible team will be able to check your questions.
Some comments in advance I can provide:

• You could use only one channel, as long as power is good for the application and PBTL is not required.
• The characterization data from data sheet is either considering stereo or mono PBTL, in any case both drivers inside the device are operating, efficiency for only one channel used would not be included.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators