TAS6424L-Q1: Is it okay to use chip inductor instead of power inductor on the output?

Chase Jeong

Mastermind 7925 points

Part Number: TAS6424L-Q1

Tool/software:

Dear TI experts,

My customer wants to use chip inductor instead of power inductor on the output.

Could you conform that it is okay?

- AUDIO SPEC - 14.4±0.5V, 20±15˚C, 4ohm ,1W , 1KHz

1. FREQUENCY RESPONSE(EQ Flat)	1kHz	Ref.
	127Hz	0±3 dB
	10007Hz	0±3 dB
2. SN RATIO	1kHz	≥ 60dB
3. THD	1KHz	≤ 0.5%
4. CH SEPARATION	1kHz	≥ 50dB
4. CH SEPARATION	10kHz	≥ 50dB
5. MAX Power	10% T.H.D	≥ 20W

They want to change L4012 and L4014 to chip inductor.

They saw the document SLOA242, there are some results using chip inductor.

Please check this issue. Thanks.

Best regards,

Chase

10 months ago

+1 Gregg Scott 10 months ago

TI__Mastermind 45085 points

Chase,

The Murata DFE322520FD-3R3M is a good choice. Contact Murata and see if they have upgraded this part. I believe that have one with a "T" in the suffix for this amplifier. Many other companies make size too. The Coilmaster below the Murata is the same size and is good also.

Regards,
Gregg Scott

0 Chase Jeong 10 months ago in reply to Gregg Scott

Mastermind 7925 points

Dear Gregg,

Thank you for your support.

I have one more question from my customer.

- Can my customer swap the output positive and negative of TAS6424L-Q1?

Best regards,

Chase

+1 Gregg Scott 10 months ago in reply to Chase Jeong

TI__Mastermind 45085 points

Chase,

Yes, the outputs can be swapped. This is a balanced output, so swapping is not a problem. The absolute phase on the speaker will change by 180 degrees.

Regards,
Gregg Scott

0 Chase Jeong 10 months ago in reply to Gregg Scott

Mastermind 7925 points

Dear Gregg,

Thank you for your support.

Then I do not need to change any register value and just swap the positive and negative output?

Best regards,

Chase

+1 Gregg Scott 10 months ago in reply to Chase Jeong

TI__Mastermind 45085 points

Chase,

That is correct.

Regards,
Gregg Scott

0 Chase Jeong 9 months ago in reply to Gregg Scott

Mastermind 7925 points

Dear Gregg,

Hope you have a good day.

My custmer asked one more question. Could you check it?

In section 9.3.1.4 of datasheet, I can find the document about SCLK&MCLK connected together.

I Think that I can use this mode if I attach 0 ohm to R4068.

Could you explain more about it? Where can I find more information on datasheet?

Best regards,

Chase

0 Gregg Scott 9 months ago in reply to Chase Jeong

TI__Mastermind 45085 points

Chase,

In TDM mode, The SCLK and MCLK are the same frequency if set to 128 or 256fs. Therefore, it is not necessary to provide a separate MCLK. You found the section in the datasheet. This is all we have.

Regards,
Gregg Scott

Audio

Audio forum

TAS6424L-Q1: Is it okay to use chip inductor instead of power inductor on the output?