Ericsson Internal
PRODUCT SPECIFICATION
1 (5)
Prepared (also subject responsible if other)
No.
ESKEVIN
3/1301-BMR 640 1401+ Uen
Approved
Checked
Date
Rev
Reference
SEC/D (Julia You)
EZYPING
2007-8-27
D
EMC Specification
Conducted EMI measured according to EN55022, CISPR 22
and FCC part 15J (see test set-up).
The fundamental switching frequency is 485 kHz for
PKR 4713 SI @ VI = 53 V, max IO.
Conducted EMI Input terminal value (typ)
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= 1μF 100V
C2= 10μF 100V
C3,C4= 2.2nF
1500Vdc
L1= Pulse PO354
1.17mH
EMI with filter
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.
Output ripple and noise test setup
E
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
EN/LZT 146 302 R6E September 2007
Ericsson Power Modules AB
Technical Specication
E
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
EN/LZT 146 302 R6F November 2007
Ericsson Power Modules AB
Technical Specication
E
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
EN/LZT 146 302 R6G November 2008
Ericsson Power Modules AB
Technical Specication
26