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BCD.00197 Rev AG, 09-Mar-2021

Page 8 of 11

IBX15 Series

Boost Converters

© 2021 Bel Power Solutions & Protection

Electromagnetic Emissions

The EMC requirements must be observed at the end product system level. However, the company tests the converters to EMC

standards. The integrated input filter reduces the reflected input current and improves EMC features. Further improvements are

possible by adding simple external filters; see fig. below.

The large input capacitor C1 (720 µF /200 V) provides stability during surge tests. The other components are:

C51 = C52 = 10 nF / 300 V, Y2

C2 = 4.7 nF / 300 V, Y2

C3 = 3 µF / 250 V, X7R

C4 = 5 µF / 250 V, X7R

L1 = 4.4 mH

+

C51

C4

C52

V

i

+

-

C3

C1

C2

case

IBX15

L1

Fig. 7

External filter for compliance with EN 50121-3-2

Fig. 8

Conducted emissions of 24IBX15-50-0G. V

V, 2 A; case connected to PE; with input filter fig. 7