AVQ100-48S12 DC-DC Converter TRN
11/16
ꢀ
SenseꢀCharacteristicsꢀ
Ifꢀ theꢀ loadꢀ isꢀ farꢀ fromꢀ theꢀ unit,ꢀ connectꢀ S+ꢀ andꢀ Sꢁꢀ toꢀ theꢀ terminalꢀ ofꢀ theꢀ loadꢀ respectivelyꢀ toꢀ
compensateꢀ theꢀ voltageꢀdropꢀ onꢀ theꢀ transmissionꢀ line.ꢀ Ifꢀ theꢀ senseꢀ compensateꢀfunctionꢀ isꢀ notꢀ
necessary,ꢀconnectꢀS+ꢀtoꢀVo+ꢀandꢀSꢁꢀtoꢀVoꢁꢀdirectly.ꢀ
InputꢀRippleꢀ&ꢀInrushꢀCurrentꢀAndꢀOutputꢀRippleꢀ&ꢀNoiseꢀTestꢀ
Configurationꢀ
Probe
Currentꢀprobe
L1
50mm
Vo+
Voꢁ
Vin+
DC/DC
Vinꢁ
C1 C2
C3 C4
Cin
Load
Vdc
ꢀ
Figureꢀ16ꢀ ꢀ Inputꢀrippleꢀ&ꢀinrushꢀcurrent,ꢀoutputꢀrippleꢀ&ꢀnoiseꢀtestꢀconfigurationꢀ
Vdc:ꢀDCꢀpowerꢀsupplyꢀ
L1:ꢀ12ꢂHꢀ
Cin:ꢀ220ꢂF/100Vꢀtypicalꢀ
C1ꢀ~ꢀC4:ꢀSeeꢀFigureꢀ11ꢀ
Note:ꢀ Itꢀ isꢀ recommendedꢀ toꢀ useꢀ aꢀ coaxialꢀ cableꢀ withꢀ seriesꢀ 50ꢃꢀ resistorꢀ andꢀ 0.68ꢂFꢀ ceramicꢀ
capacitorꢀorꢀaꢀgroundꢀringꢀofꢀprobeꢀtoꢀtestꢀoutputꢀrippleꢀ&ꢀnoise.ꢀ
EMCꢀTestꢀConditionsꢀ
TheꢀcustomerꢀactualꢀEMIꢀcircuitꢀisꢀshownꢀinꢀtheꢀfollowingꢀfigure.ꢀ ꢀ
U2
U1
1mH
In+
Inꢁ
Out+
Vin+
Vinꢁ
VO+
VOꢁ
Cy1
Cy2
C1 C2
Cx
C3
C4
DC/DC
Outꢁ
ResistiveꢀLoad
PE
EMIꢀfilter
ꢀ
Figureꢀ17ꢀ ꢀ EMCꢀtestꢀconfigurationꢀ
CX:ꢀ1ꢂF/100Vꢀceramicꢀcapacitor,ꢀC3225X7R2A225KT0LOU/TDKꢀ ꢀ
Cy1,ꢀCy2:ꢀ2200pF/1000Vꢀceramicꢀcapacitor,ꢀGHM1535X7R223K1KD550/MURATAꢀ
C1:ꢀ0.1ꢂF/100Vꢀceramicꢀcapacitor,ꢀC1206X7R2A105KT0L0U/TDKꢀ
C2:ꢀ100ꢂF/100VꢀlowꢀESRꢀaluminumꢀelectrolyticꢀcapacitor,ꢀUVZ2A101MPDꢀ
C3:ꢀ1ꢂF/25Vꢀceramicꢀcapacitor,ꢀC2012X7R1E105KT000N/TDKꢀ
C4:ꢀ220ꢂF/100VꢀlowꢀESRꢀaluminumꢀelectrolyticꢀcapacitor,ꢀUPM1E221MHDꢀ ꢀ
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