• Resolved

TPA6141A2: 【Urgent】 RF noise filter of TPA6141A2's output

Expert 2830 points

Part Number: TPA6141A2

Dear Technical Support Team,

 

I'd like to confirm the RF noise filter of TPA6141A2's output urgently.

Our customer is launching mass production.

 

They are designing the Bluetooth speaker and it can connect an earphone cable with TPA6141A2.

When connecting an earphone cable to jack, approximately 150MHz RF noise affects TPA6141A2 through earphone cable.

To prevent this RF noise, 1000pF capacitors are set on OUTL and OUTR.

 

Could you see the attached file?

TPA6141A2.pptx

 

■Questions

1.) Do you have a solution to reduce RF noise through earphone cable?

2.) Is 1000pF OK to reduce RF noise? I'm concern an oscillation of headphone AMP.

    The datasheet doesn't show capacitive load specification.

3.) Is it better to set the sunber circuit(C and R) on OUTR and OUTL?

      if possible , could you show the value of C and R for sunber circuit. 

 

Best Regards,

ttd