This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: TPA2012D2
I can see the various output power with different VDD from Figure 33. Output Power vs Load Resistance.
but i need to estimate the outpower power level at 3.3V to insure output power from TPA2012 is not bigger than 0.7W speaker.
my speaker has 0.7watt rating thus i want to feed less than 0.7W to prevent blowing speaker.
where i can find the equation to calculate?
What is the impedance of your speaker?The output power can be adjusted by changing the gain of the amplifier, or adjusting the input signal.
Best regards,-Ivan SalazarApplications Engineer - Low Power Audio & Actuators
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Ivan Salazar:
My speaker has 8 ohms.
And, I want to set the highest gain (G0.G1=0) and insure output power from TPA2012D2 is not more than 0.7Watt by limitation of VDD.
is three any formulation to calculate this?
I think I am asking the same question twice.
In reply to WONHO KIM:
If you limit the output power by reducing VDD the output will be distorted. By lowering VDD the output signal will be clipped, if the gain is high the amplifier will still try to output the amplified signal, but if there is not enough voltage on VDD the signal at the output will be saturated.
I would recommend to either test your maximum input signal across different gain levels to verify that 0.7W is not surpassed, or adjust the input signal amplitude on a specific gain level. These two options would help to not saturate the output signal.
what I wanted is how to calculate the maximum output power with 3.3V.
if you can not answer this question then please stop replying.
I asked "A" but you are answering "B".
VDD = 3.3V and gain = 24dB:
Below is a THD+N vs Pout plot for your reference.
You can calculate the output power like any other Class-D amplifier, and you can also use the TINA model to simulate the device on your required setup.
OK, thank you
thus anyway less than 600mW in worst case, is that correct?
That is correct, for you specific VDD and load impedance conditions.Keep in mind that the input signal should be less than 152mVrms to keep distortion below 10% at gain = 24dB.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.