TPA 3116 miniamp loudspeaker pop

[stoppage]

Hi Folka I recently purchased a really cheap no-name amp from “Banggood” supposedly a TPA 3116 IC Tpa3116 class d bluetooth 5.0 hifi 2x50w stereo amplifier support usb tf card rca aux usb stick Sale - Banggood.com
…I just needed something simple for the bedroom. For the price the sound isn`t so bad but the speakers pop rather loudly on power-up . I`m afraid of eventual damage to the speakers so I`m looking to the experts for a solution. Is there a simple “filter” (spike suppression)? I could use on the line out? I once had a problem with “Hum” on a system and a simple filter solved it, so I`m thinking something similar. Can somebody help me please, I kinda like this amp. Obliged

 

[Mark Tillotson]

Found this video - don't know if it applies to your board, but it seems relevant.


BTW class D has its own sub-forum.

 

[stoppage]

...is there a link for the video?

 

[tomchr]

See section 7.3.3 in the TPA3116 data sheet.

If you take the amp apart you might be able to trace out the circuit and see how the shutdown/mute is handled. You may be able to increase a time constant there.

Alternatively, you can add an external (DIY) circuit to the amp to disconnect the speaker until the amp has settled.

Tom

 

[xrk971]

This is a well known problem with the TPA3116/3118. It’s discussed in the monster thread and here. It’s not easy to fix - a relay with a delay is about all you can do easily. They are such low power usage devices, the easiest thing to do is to leave them on forever (until you need to move them etc). Turn them on and wait a few seconds before connecting the speakers.

It’s a good sounding amp for a lot of applications. If you want a pop-free amp try the TDA8932. It has anti pop built in.

 

[stoppage]

The "relay with a delay" as external fix sounds really good. Just one thing...is this it...?
…….”UPC1237 Dual Channel Speaker Protection Circuit Board DC 12-24V Boot Mute Delay…..”
UPC1237 Dual Channel Speaker Protection Circuit Board DC 12-24V Boot Mute Delay | eBay

 

[xrk971]

That should work just make sure that it’s compatible with BTL amps where both speaker outputs are “live”. That is, the negative speaker out cannot be tied to ground.

 

[stoppage]

Thanks xrk 971 I`m a little intimidated with this solution (out of my depth). I`'ve come across another possibility,,,a speaker switch... Audio Speaker Switch Box Switch for 4 Speakers – Black: Amazon.de: Electronics & Photo
Cosidering both

 

[stoppage]

....."If you want a pop-free amp try the TDA8932"...would you know of a 2 x 20w or a 2 x 50w., also pop-free?

 

[stoppage]

I bought a cheap loudspeaker switch box, works fine, while I`'m waiting for....."…Digital Amplifier Speaker Protective Board BTL Steady Module for TDA7492 TDA7498 TPA3116 ….."
https://www.amazon.de/Digitaler-Verst%C3%A4rker-Lautsprecher-Schutzbrett-TDA7492/dp/B07J9NH6LT

 

[gasolin75]

This is a well known problem with the TPA3116/3118. It’s discussed in the monster thread and here. It’s not easy to fix - a relay with a delay is about all you can do easily. They are such low power usage devices, the easiest thing to do is to leave them on forever (until you need to move them etc). Turn them on and wait a few seconds before connecting the speakers.

It’s a good sounding amp for a lot of applications. If you want a pop-free amp try the TDA8932. It has anti pop built in.

Yes it is get a fosi audio 10a or BT10A or somthing like nobsound G3 or the 2021 updated version, no pop noise