Division 3.2: Efficiency of the 48V/12V DC/DC converter - Commission Implementing Decision (EU) 2019/313 of 21 February 2019 on the approval of the technology used in SEG Automotive Germany GmbH High efficient 48V motor generator (BRM) plus 48V/12V DC/DC converter for use in conventional combustion engine and certain hybrid powered light commercial vehicles as an innovative technology for reducing CO2 emissions from light commercial vehicles pursuant to Regulation (EU) No 510/2011 of the European Parliament and of the Council (Text with EEA relevance)

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

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

The nominal power of the 48V/12V DC/DC converter shall be the continuous output power at the 12V side guaranteed by the manufacturer of the DC/DC converter at the conditions specified in the ISO 8854:2012.

The efficiency of the 48V/12V DC/DC converter shall be measured at least five (5) times consecutively. The average of all the measurements ( $\bar{η_{DC ∕ DC}}$ ) shall be calculated and used for the calculations laid down in paragraph 3.3.

Division 3.2 Efficiency of the 48V/12V DC/DC converter