Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

  • State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 247 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

LM4871: Power dissipation

Alexander Lidman
Prodigy 50 points
Part Number: LM4871

Hi

If LM4871M device is connected to audio transformer, can I still use formula 2 from datasheet, page 10 to calculate power dissipation?

What transformer value I need to use for RL (Impedance or DC resistance)?

 

Best Regards

Alex

  • 0
    TI__Guru* 84915 points

    Hi, Alexander,

    Yes, this formula also works when the load is a transformer.

    Regarding your question about the transformer value that you need for the formula, I will recommend to take the impedance value. it actually depends of what you need for your calculations. If you take the impedance value, you will get the apparent power, considering the power losses. The DC resistance will give you only the real power.

    Please let me know if you have additional question or comments on this. We will be glad to help you.

    Best regards,
    Luis Fernando Rodríguez S.