TLV320DAC3100: TLV320DAC3100

Hi Chithraj,

You may check if TLV320DAC3101 can support this application. It is rated for slightly lower than 2W @ 8Ohm.
If higher power and stereo are both required, you may need to change into higher voltage rated devices. If 2xmono is an option then you can consider something like TAS2505, TAS2552/53 or TLV320DAC3100/20 using SPKVDD = 5.5V

If you need details on VOLUME control pin, you can refer to D/S section 6.3.10.3: https://www.ti.com/lit/ds/symlink/tlv320dac3100.pdf#page=34&zoom=100,0,800
This feature can be enabled or disabled, as there is digital volume control already, along with analog gain controls depending on the driver being used (HP or Speaker).

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan Salazar,

Thanks for your support.

I have some queries regarding the same part TLV320DAC3100. Is it possible to convert the Class A/B Headphone/Lineout driver pins HPL and HPR to similar function as Mono Class-D speaker driver pins SPKP and SPKM. If its possible kindly suggest which kind of amplifier IC part I can use to convert it to drive 2.5W speaker.

Please provide your inputs for the same.

Regards,

Chithraj S

Hi Chithraj,

Unfortunately I don't think there is a device capable or readjusting in such way to drive Class-D speaker output from other function pins.

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan Salazar,

Thanks for your reply.

I'm working on this. Is it possible to control the volume of HPL and HPR pins by changing the values of the SW registers mentioned in the attachment.

Please confirm the same.

Regards,

Chithraj S

Hi Chithraj,

Yes, there are several different sections where you can add gain/attenuation along with signal path, specifically for HP outputs it's the digital gain in the DAC, an analog attenuation PGA and analog gain at the Class-AB driver:

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan Salazar,

Thank you for the confirmation regarding the volume control details. I'm planning to use this digital potentiometer part TPL0401A-10 controlled with I2C interface and 128 steps for the volume control only for HPL & HPR pins for the same amplifier TLV320DAC3100.

Please suggest your inputs.

Regards,

Chithraj S

Hi Chithraj ,

If you're planning to use a potentiometer for volume control, then I think you may use VOL/MICDET pin instead. Further details in section 6.3.10.3 from D/S: https://www.ti.com/lit/ds/symlink/tlv320dac3100.pdf#page=34&zoom=100,0,800

Best regards,
-Ivan Salazar
Applications Engineer

Dear Ivan Salazar,

As per our requirement, we need to control the volume(High, Low & Mute) externally through some kind of switches(Eg: Push button).

So providing digital potentiometer to the VOL/MICDET pin, is it possible to control the volume externally as per the above requirement?

Please suggest.

Regards,

Chithraj S