# Commission Implementing Decision (EU) 2020/1167 of 6 August 2020 on the approval of the technology used in a 48 Volt efficient motor-generator combined with a 48 Volt/12 Volt DC/DC converter for use in conventional combustion engine and certain hybrid electric passenger cars and light commercial vehicles as an innovative technology pursuant to Regulation (EU) 2019/631 of the European Parliament and of the Council) (Text with EEA relevance), Division 2.2: 48V/12V DC/DC converter efficiency

Extent: E+W+S+N.I.

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 [%].

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Source: https://www.legislation.gov.uk/eudn/2020/1167/annex/division/2/division/2.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2020-1167/annex/division-2/division-2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.