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TPA3126D2: Replaced TPA3116D2 with TPA3126D2

Part Number: TPA3126D2
Other Parts Discussed in Thread: TPA3116D2,

Hello everyone

The thread was locked so I will report it in a new thread.
The seasons have changed and Japan has turned into autumn.
How are you all doing?

Summer in Japan is very hot, but this problem made it even hotter this year.
I was able to solve it thanks to everyone's advice, so I'll report back how I did it for anyone with the same problem.

As a result, by setting "AM Avoidance Frequency Selection" to "AM2=1, AM1=1, AM0=0 Modulation scheme Fixed in 1SPW Mode", it operated continuously with sine wave 4Ω 40W stereo like TPA3116D2.

With this setting, the TPA3126D2 operates in 1SPW Mode, which is compatible with the TPA3116D2, and operates with both high output and low heat generation.
In my opinion, the TPA3126D2 was developed with a focus on low power and low consumption for battery-powered applications.

Only this setting left compatibility with TPA3116D2, so I was able to solve the problem.
However, since the PWM frequency is fixed at 300kHz, the NHK radio is noisy at close range to the amplifier.
However, this will allow us to continue supplying the product.

I would like to thank Yanming Gong, Sadanori Kato, Jesse Ji for their advice, and everyone who read this.


  • Hi Hiroshi-san,

    Thank you! I am fine. Now it is China autumn, so comfortable.

    About the Fsw concern, TPA3126 can support Hybrid Mode, and this mode also can support several Fsw configuration.

    The "AM2=1, AM1=1, AM0=0 Modulation scheme Fixed in 1SPW Mode",  that means TPA3126 also reserve 1SPW mode. 

    So I suggest they can use TPA3126 Hybrid Mode and adjust Fsw according to their applicaiton.