Power On Thump Noise Shut Down Pop Up Noise Remover Circuit For Tpa3116D2 Tpa3118D2

[Biju JP]

Hello Friends Today Iam Shareing Power On Thump Noise, Shutdown Pop-up Noise Remover Circuit For Tpa 3116D2, Tpa 3118D2 Class d Amplifier Chips. Its Works Very Well With Both Power Supply's Whether Its A Conventional Transformer Power Supply Or a Smps. Pop-up Sound Will Not Present In Power On/Off Times. When Using A Non-Regulated Power Supply Input Voltage Below 18vdc Q1 Transistor Try To Conduct Its Will Enable The Mute For Short Period ( Or a False Trigger ). I Will Drop The Schematics Here, All suggestions And Modifications From Group Member's Are Welcome. Recommended Voltage Ratings Are +18vdc To +24vdc (max). Circuit Can Power From Same Amplifier Power Supply. I Have Upload a Demo Working Video On Youtube For This. Watch Here
Anti Power On Thump Noise // Shut Down Pop Up Noise Remover Circuit For Tpa 3116D2 Tpa 3118D2 Chips - YouTube

Link For Schematics : Mute Circuit-1.pdf - Google Drive.

 

[CyberPit]

Hi Biju JP-San,

I simulated your idea.
It may work as expected.
The result is attached.

I also made another Uniti-Pop Curcuit.
The result also attached as below...

Regards,
CyberPit

 

[Biju JP]

Hi CyberPit

Thanks For The Quick Feedback, Your Circuit Is Also Good, Using Only A P-Fet. which P-Fet ( TO-92 ) Used In Your Circuit?

Regards,
JP

 

[CyberPit]

There are few choices in TO-92 package in today.
VGS(th) will reflect to voltage drop detection sensitivity.
On the other hand, we should care VGS(MAX) if the VDD supply voltage exceeds 20V. Considering to add a VGS dividing resistor for this reason.
I guess Diodes ZVP4424A will fit for my circuit.


CyberPit
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