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AN2521 Datasheet(PDF) 22 Page - STMicroelectronics

Part # AN2521
Description  19 V - 75 W laptop adapter with tracking boost PFC
PDF  33 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2521 Datasheet(HTML) 22 Page - STMicroelectronics

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Conducted emission pre-compliance test
AN2521
22/33
5
Conducted emission pre-compliance test
The following figures are the peak measurements of the conducted noise emissions at full
load and nominal mains voltages. The limits shown on the diagrams are those of EN55022
Class-B, which are most popular requirements for domestic equipment and imposes less
stringent limits compared to the Class-A, which is dedicated to IT technology equipment. As
visible in the diagrams, in all test conditions there is a good margin for the measurements
with respect to the limits.
Figure 29.
CE peak measure at 100 Vac and full load
Figure 30.
CE peak measure at 230 Vac and full load



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