參數(shù)資料
型號: PKB4619PIPNBP
廠商: ERICSSON POWER MODULES AB
元件分類: 電源模塊
英文描述: 1-OUTPUT 62.5 W DC-DC REG PWR SUPPLY MODULE
封裝: 58 X 19.94 MM, 7.62 MM HEIGHT, LOW PROFILE, EIGHTH BRIK PACKAGE-8
文件頁數(shù): 10/12頁
文件大?。?/td> 233K
代理商: PKB4619PIPNBP
7
PKB 4000
EN/LZT 146 033 R1A Ericsson Power Modules, October 2003
EMC Specication
The conducted EMI measurement was performed using a
module placed directly on the test bench.
The fundamental switching frequency is 330kHz..
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.
C1
C2
C3
C4
C1: 2x1F/100V ceramic
C2: 4x1F/100V ceramic
C3: 100F/100V electrolytic
C4: 2x2700pF/2000V ceramic
C5: 2700pF/2000V ceramic
L1: Common mode inductor
1.5 mH, each winding consists of 13 turns
of AWG # 21 wire on the T18-10-10E HS72 core from TDK.
L1
+
IN
-
+
OUT
-
C5
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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