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Division 2.2 48V/12V DC/DC converter efficiency

United Kingdom

Original text. Later amendments are not shown.

The efficiency of the 48V/12V DC/DC converter shall be determined under the following conditions:

  • Input voltage of 52 V

  • Output voltage of 14,3 V

  • Output current: nominal power of the 48V/12V DC/DC converter divided by the output voltage of 14,3 V

The nominal power of the 48V/12V DC/DC converter shall be the continuous output power certified by the supplier in accordance with the requirements specified in ISO 8854:2012.

The efficiency of the 48V/12V DC/DC converter [%] shall be calculated from the current and voltage intensity measurements according to Formula 3.

Formula 3

where

  • is the input voltage, which shall be set to 52 [V]

  • is the current intensity measured on the input side [A]

  • is the output voltage, which shall be set to 14,3 [V]

  • is the current intensity measured on the output side, which should be equal to the nominal power of the 48V/12V DC/DC converter divided by the output voltage [A]

    • The measurements and efficiency calculations shall be repeated at least five (5) times consecutively.

    The average of those efficiencies shall then be the efficiency of the 48V/12V DC/DC converter [%].