E
EJUNGYA
Approved
Ericsson Internal
PRODUCT SPECIFICATION
No.
Checked
Date
1 (5)
Prepared (also subject responsible if other)
3/1301-BMR 636
Technical Specification
01/A4 Uen
2007-6-18
EN/LZT 146
382 R1A June
2007
Rev
Reference
8
PKB
4717
You)
SEC/D (Julia
PINB
DC/DC converters,
Input
36-75
V, Output
10.5
A/75 W
ECHWANG
A
© Ericsson Power Modules AB
EMC Specification
Conducted EMI measured according to EN55022, CISPR 22
and FCC part 15J (see test set-up). See Design Note 009 for
further information. The fundamental switching frequency is
200 kHz for PKB 4717 PINB @ V
I
= 53 V, max I
O
.
Conducted EMI
Input terminal value (typ)
Test set-up
Layout recommendation
The radiated EMI performance of the DC/DC converter will
depend on the PCB layout and ground layer design.
It is also important to consider the stand-off of the DC/DC
converter.
If a ground layer is used, it should be connected to the output
of the DC/DC converter and the equipment ground or
chassis.
A ground layer will increase the stray capacitance in the PCB
and improve the high frequency EMC performance.
Output ripple and noise
Output ripple and noise measured according to figure below.
See Design Note 022 for detailed information.
EMI without filter
External filter (class B)
Required external input filter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
Filter components:
C1,2,6 = 1
μF/100
V
Ceramic
C3, 4 = 2.2 nF/1500 V
Ceramic
C5 = 100
μF/100
V
Electrolytic
L1,L2 = 1.47 mH
2.8 A, Common Mode
Output ripple and noise test setup
EMI with filter
ERICSSON [ ERICSSON ]
