PKM2515EPI Ericsson Power Modules, PKM2515EPI Datasheet - Page 20

• Manufacturer Part Number: PKM2515EPI
• Description: DC/DC Converters & Regulators 15Vdc 3.3A Isolated Input 18-36V 50W
• Manufacturer: Ericsson Power Modules
• Series: PKM-Er

Specifications of PKM2515EPI

• Output Power: 50 W
• Input Voltage Range: 18 V to 36 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 15 V
• Output Current (channel 1): 3.3 A
• Package / Case Size: Quarter Brick
• Output Type: Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EMC Specification
The conducted EMI measurement was performed using a
module placed directly on the test bench .
The fundamental switching frequency is 180 kHz for
PKM2510E PI @ V
External filter (class B)
Required external input filter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J .
PKM 2510 E PI without filter
PKM 2510 E PI with filter
PKM 2000E PI Datasheet
Conducted EMI Input terminal value (typ)
0.68uF
PO422(Pulse)
768uH
I
= 27V, I
0.68uF
O
= (0 .1 . . .1 .0) x I
3.9nF
3.9nF
47uH
0.68uF
220uF
O
max .
+
+
-
DC/DC
0
Test set-up.
Layout Recommendation
The radiated EMI performance of the DC/DC converter
will be optimised by including a ground plane in the PCB
area under the DC/DC converter . This approach will re-
turn switching noise to ground as directly as possible, with
improvements to both emissions and susceptibility . It is also
important to consider the stand-off of the PKM 2000E series
DC/DC converter . If one ground trace is used, it should be
connected to the input return . Alternatively, two ground
traces may be used, with the trace under the input side of
the DC/DC converter connected to the input return and the
trace under the output side of the DC/DC converter con-
nected to the output return . Make sure to use appropriate
safety isolation spacing between these two return traces .
The use of two traces as described will provide the capabil-
ity of routing the input noise and output noise back to their
respective returns .
Output ripple and noise
The circuit below has been used for the ripple and noise
measurements on the PKM 2000E Series DC/DC converters .
DC
Power
Source
* Conductor from Vout to capacitors = 50mm [1.97in]
+
-
50 ohm input
in
in
5µH 50Ω
5µH 50Ω
LISN
LISN
+Sense
-Sense
+Vout
Output ripple and noise test setup
-Vout
Trim
rcvr
rcvr
EMC
Reciver
EN/LZT 146 050 R4A © Ericsson Power Modules, March 2007
out
out
1 m Twisted Pair
Optional Connection
to Earth Ground
50 ohm temination
Ceramic
Capacitor
0.1uF
Filter
(if used)
Computer
Tantalum
Capacitor
Printed Circuit Board
+
10uF
Power Module
BNC
Connector
to Scope
Load
Resistive
Load