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参数资料
| 型号： | PKJ4711EPIP |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 2.300 X 2.400 INCH, 0.330 INCH HEIGHT, LOW PROFILE, HALF BRICK PACKAGE-9/8 |
| 文件页数： | 5/18页 |
| 文件大小： | 480K |
| 代理商： | PKJ4711EPIP |
13
PKJ 4000E PI
EN/LZT 146 025 R2A Ericsson Power Modules, May 2003
EMC Specication
The conducted EMI measurement was performed using a
module placed directly on the test bench.
The fundamental switching frequency is 140kHz for PKJ
4810E PI @ VI = 53V, IO = (0.1...1.0) × IOmax.
External lter (class B)
Required external input lter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
The capacitors are ceramic type. Low ESR is critical for
achieveing these results.
Test set-up.
PKJ 4810E PI with lter.
DC
Power
Source
+
-
5H 50
5H 50
LISN
in
out
rcvr
50 ohm input
1 m Twisted Pair
50 ohm temination
Optional Connection
to Earth Ground
Filter
(if used)
Power Module
Resistive
Load
Printed Circuit Board
EMC
Reciver
Computer
Conducted EMI Input terminal value (typ)
PKJ 4810E PI without lter.
C1,2,6: 0.68uF
C3,7: 47uF
C4,5: 3.9nF
L1: Common mode inductor
on 768 uH (Pulse PO 422)
L2: DC choke: 15uH
C1
C2
C3
C6
C7
C5
C4
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 return switching
noise to ground as directly as possible, with improvements to
both emissions and susceptibility. 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 connected
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 capability of routing
the input noise and output noise back to their respective
returns.
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