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Which One have more noise AC or DC

Ashutosh Nahar
Intellectual 640 points
Other Parts Discussed in Thread: ASH

Hi,

I want to know that which one have more noise AC or DC and why is it so ?

Thanks

Ash

  • 0
    Prodigy 5 points
    Hello ASHU,
    Noise itself is an AC phenomenon. I have never heard of DC noise. AC energy may be superimposed on a DC level, thus showing up on a DC output of a power supply.

    Please explain more the nature of your question.
    You posted in the Power Module forum, so is it related to TI's power modules?
    All of TI's modules are DC to DC, none allow an AC input.
  • 0 in reply to Ed Walker
    Prodigy 5 points
    Hello ASHU,
    There are many areas of training on TI.com, many of which address noise.
    Please see this link for some insight.
    training.ti.com/achieving-low-noise-and-low-emi-performance-dcdc-switching-regulators

    Achieving low noise and low EMI performance with DC/DC switching regulators
    Mitigating switching regulator EMI and noise is seen by engineers as a black art. Mess with the feng shui of the PCB layout too much, and the system may not pass CISPR standards. Because of this, many power designers simply turn to linear regulators as a guaranteed way to avoid the headache of reducing emissions. But with inferior efficiency, linear regulators then present potential thermal issues that could be avoided by using a switching regulator. How can you get the best of both worlds?

    This training series - along with all of the accompanying documentation - is meant to illustrate how engineers can get the superior efficiency of a switcher while also overcoming the challenges of EMI and noise. Both conceptual and practical examples of EMI and noise best practices are presented, along with specific commentary regarding powering automotive systems as well as noise-sensitive analog circuitry.
    Table of contents
    1. Concepts of Switching Regulator EMI and Noise Mitigation
    2. EMI and Noise Mitigation Techniques in Practice
    3. Achieving low noise and high efficiency for noise-sensitive analog loads
    4. Low EMI and low noise DC/DC conversion in Automotive applications