TLV320AIC3007: TLV320AIC3007 After turning on the power of the Class-D speaker that causes pop noise

Minoru Nishimura

Part Number: TLV320AIC3007

Hello,

I have a question about pop noise after Class-D speakers on.

If the Class-D speaker is turned on after the wait is set for 3 ms after the WCLK operation is started, pop noise will occur.
However, when the weight is set to 3.75ms, pop noise does not occur.
At this time, the sound sampling frequency used is 8kHz (125us).

What should be the wait time between turning on the WCLK and the Class-D speaker?

Best regards,
Nomu

over 2 years ago

0 Aaron Estrada over 2 years ago

TI__Mastermind 22950 points

Hi Nomu,

Are the clocks (BLCLK, WCLK, MCLK) supplied to the device when the device is powered up? Can you provide a little more information on the general sequence you are using to configure the device?

For example:

1. Power on the device

2. Power on ADC/DAC

3. Unmute ADC/DAC

4. Power on speaker driver

Can you provide information on the sequence you are using in the format above?

Regards,

Aaron Estrada

0 Minoru Nishimura over 2 years ago in reply to Aaron Estrada

Prodigy 20 points

Hi Aaron,

Thank you for your reply.

What should be the wait time between turning on the WCLK and the Class-D speaker?

Attach the commands and waveforms used for evaluation to:

■command

//Power on the device

//Software Reset
0x00, 0x00;
0x01, 0x80;

//Class-D Speaker Initialization 
0x00, 0x0D;
0x0D, 0x0D;
0x08, 0x5C;
0x08, 0x5D;
0x08, 0x5C;
0x00, 0x00;

//Class-D Speaker setting
0x03, 0x91;
0x04, 0x04;
0x05, 0x00;
0x06, 0x00;
0x07, 0x0A;
0x08, 0x00;
0x09, 0x38;
0x0B, 0x01;
0x25, 0xC0;
0x29, 0x00;
0x2B, 0x28; //The left DAC channel is not muted
0x2C, 0x28; //The right DAC channel is not muted
0x49, 0x00; //shut down left and right class-D channnel 
0x52, 0x80;
0x55, 0x80;
0x56, 0x09;
0x59, 0x00;
0x5C, 0x00;
0x5D, 0x02;
0x65, 0x00;
0x66, 0xA2;

//I2S signal start
 WaitUs(800); //wait 800usec
//Class-D Speaker driver on
0x49, 0x0C;

■waveforms