Ericsson Internal
E
EAB/FJB/GMF Oscar Persson
PRODUCT SPECIFICATION
1 (5)
Prepared (also subject responsible if other)
No.
3/1301-BMR 662 00+ Uen
13
Technical Specification
Approved
Checked
Date
Rev
Reference
EN/LZT 146 420 R3A March 2014
PKB 4000A series Direct Converters
Input 36-72 V, Output up to 30 A / 125 W
EAB/FJB/GMF [Natalie Johansson]
MICJAKE
2010-04-11
B
© 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
further information. The fundamental switching frequency is
180 kHz for PKB 4910A PINB @ VI = 53 V, max IO.
Conducted EMI Input terminal value (typ)
Test set-up
Layout recommendations
The radiated EMI performance of the Product will depend on
the PCB layout and ground layer design. It is also important to
consider the stand-off of the product. If a ground layer is used,
it should be connected to the output of the product and the
equipment ground or chassis.
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.
A ground layer will increase the stray capacitance in the PCB
and improve the high frequency EMC performance.
Output ripple and noise
Filter components:
C1,2,3 = 1 μF
C4,5 = 2.2 nF
C6,7 = 100 μF
L1,L2 = 770 μH
Output ripple and noise measured according to figure below.
See Design Note 022 for detailed information.
Output ripple and noise test setup
EMI with filter
ERICSSON [ ERICSSON ]
