Ericsson Internal
PRODUCT SPECIFICATION
1 (5)
E
Prepared (also subject responsible if other)
No.
MICMALE
3/1301-BMR 658 Uen
17
Technical Specification
Approved
Checked
Date
Rev
Reference
EN/LZT 146 384 R4A
May 2013
PSKEBC/4D0B0e0ttBy Wsueries Intermediate Bus(ECZHonEvWeNrGte)rs2009-12-16
Input 36-75 V, Output up to 40 A / 252 W
PB3
© Ericsson AB
EMC Specification
Conducted EMI measured according to EN55022, CISPR 22
and FCC part 15J (see test set-up). See Design Note 009 for
detailed information. The fundamental switching frequency is
180 kHz for PKB 4204B PI @ VI = 53 V, max IO.
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.
EMI without filter
If a ground layer is used, it should be connected to the output
of the DC/DC converter and the equipment ground or chassis.
External filter (class B)
Required external input filter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
A ground layer will increase the stray capacitance in the PCB
and improve the high frequency EMC performance.
Output ripple and noise
Components:
C1,2,3 = 1 F
(100 V, ceramic)
C4,5 = 2.2 nF
(2 kV, ceramic)
Output ripple and noise measured according to figure below.
See Design Note 022 for detailed information.
Tantalum
Capacitor
Ceramic
Capacitor
C6 = 220 F
(100 V, electrolytic)
L1,2 = 809 H
(common mode)
+Vout
-Vout
+
10uF
0.1uF
*Conductor from Vout to capacitors = 50mm [1.97in.]
BNC
Connector
to Scope
Output ripple and noise test setup
EMI with filter
ERICSSON [ ERICSSON ]
