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How can design economic SMPS power for 5.1ch DVD-R system?

YongGwn Kim
Intellectual 2025 points

How can design economic SMPS output power wattage for 5.1ch DVD-R system?

If  someone design 5.1ch, 100W X5ch and 150W x1ch audio system, SMPS should be support minnum 250W becasue real audio signal can't happened same time max output of each channels. That is real audio system test result becasue we can't calculate correct output power condition due to not fixed output power during play everytimes. The calcualtion method is that two chanels max power plus min 25% margin. 100W x 2 = 200W x 1,25 = 250W.

 

  • 0
    TI__Expert 5555 points

    Just to add a little extra detail, YG Kim and I have seen the following patterns with many customers when they decide how much power their SMPS needs to supply.

     

    Below, satellite power = left, right, center, surround speakers (anything but the subwoofer)

    total system power = all speaker output powers added together, specified at 10% THD.

     

    For a 5.1 system = 2x(satellite power) + 25%

    For a stereo system = 0.5 x total system power

    For a 2.1 system = 0.5 x total system power

    For a 7.1 system = 2x(satellite power) + 50%

     

    Cheers

     

    /R

  • 0
    TI__Intellectual 2025 points

    Dear.

    It really depends on customer test conditions, especially aging or burn-in test spec. Do you have any test spec?. No matter what, nobody can design max power SMPS meaning is each channel maximum power times total output channels hence I would like recommend below SMPS design spec, that is minim power supply design spec.

     

    Any question?. Let me know. YG Kim