TPA3123D2

Hi, Srinivas,

Sorry for the delay.

There could be two problems here:

1) thermal. Poor PCB layout with not enough heat sinking capability to dissipate the power. Try cooling the PCB to see if it improves.

2) Output filter design. Inductor is saturating, tripping short circuit protection. Pull all caps to ground off the output tosee if the IC works correctly. If so, use an inductor with a higher current rating.

-d2

Hi,

      What happening is my amplifier is working for 12V. But when i connect 24V it is drawing more current and not playing. When i reduce the voltage again back to 12V it is playing. what might be the problem. Is there any thing to do with Filer Design. Please Kindly help me to debug the Fault.

thank you.

Regards,

Srinivas. T.

Hi,

I am configuring a TPA3123D2 and I am interested to know more about the power ground and analog ground! Why this separation?? Because after all these two grounds are connected in Power Ground and so they are the same ground!

Thank you

Hi Silva,

               There is a need to separate Both Analog and Power grounds. All the audio input signals are referred w.r.t to analog ground which are basically low level signals. All the voltages are referred w.r.t power ground which are basically high level signals (10V to 30V). Power sources are not ideal which generates small amount of noise which can enter or disturb analog signals if we refer both w.r.t to same ground. Hence in practical applications both ground planes are separated, like power ground plane on right side and analog ground plane on left side. In general Finally the analog ground also connected to power ground via an INDUCTOR which suppress analog noise crossing the ground planes. Since finally we have only one ground, both grounds must be shorted.

Thank you.

Hi,

Thank you for your feedback! What is the value of inductor that you recommend I use for short the power ground and analog ground? Na for my specific case of short these two grounds via pad dissipator of TPA31232D?

Thank you