ON Semiconductor EVBUM2516/D, User Manual

Page: 8 / 26

EVBUM2516/D
www.onsemi.com
8
Coupling between primary and secondary is ensured
by the Y − capacitor CY1, which is connected between
secondary ground and primary bulk voltage. Similar
functionality have CY2 and CY3, which are placed between
input terminals (L, N) and their center point is connected to
PE earth terminal. PE
− A and PE − B allow making the
connection between secondary ground GND and input earth
terminal (PE). The connection should be made by awg 18 or
0.75 mm
2
wire with optionally threaded ferrite bead.
This configuration of CY1 − 3 helps to improve the EMI
signature of the converter and pass legislation EMI emission
limits.
PBC Layout
The PCB is made as a double layer FR4 board with 35
m
m
copper cladding.
Figure 8. Evaluation Board − Top Side Components
Figure 9. Evaluation Board − Bottom Side Components