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ADDITIONALFUNCTIONS
ConnectingtheDCP02inSeries
使不能运转/使能
解耦
RippleReduction
ConnectingtheDCP02inParallel
DCP
02
+V
输出
V
供应
+V
输出
V
输出
V
输出
0V
V
S
0V
COM
V
供应
2 x 电源 输出
COM
DCP
02
V
输出
V
S
0V
同步
0V
DCP
02
V
输出
V
S
0V
同步
0V
DCP02Series
SBVS011C–MARCH2000–REVISEDDECEMBER2005
multipledcp02isolated2wdc/dcconverterscan
TheDCP02canbedisabledorenabledbydrivingthe
beconnectedinseriestoprovidenonstandard
syncpinusinganopendraincmosgate.ifthe
voltagerails.thisispossiblebyusingthefloating
syncpinispulledlow,thedcp02willbedisabled.
outputsprovidedbythegalvanicisolationofthe
thedisabletimedependsupontheexternalloading;
dcp02.
theinternaldisablefunctionisimplementedin2
µ
s.
RemovalofthepulldownwillcausetheDCP02tobe
ConnectthepositiveV
输出
fromoneDCP02tothe
使能.
negativeV
输出
(0v)ofanother(看Figure7).ifthe
syncpinsaretiedtogether,theself-同步
CapacitiveloadingontheSYNCpinshouldbe
featureoftheDCP02willpreventbeatfrequencieson
minimizedinordertopreventareductioninthe
thevoltagerails.thesyncfeatureofthedcp02
oscillatorfrequency.
allowseasyseriesconnectionwithoutexternal
过滤,thusminimizingcost.
theoutputsonthedual-outputdcp02versionscan
alsobeconnectedinseriestoprovidetwotimesthe
magnitudeofV
输出
,asshowninFigure8.为
Thehighswitchingfrequencyof400kHzallows
例子,adual15vdcp022415dcouldbe
simplefiltering.toreduceripple,itisrecommended
connectedtoprovidea30vrail.
thata1
µ
FcapacitorbeusedonV
输出
.dualoutputs
shouldbothbedecoupledtopin5.a2.2
µ
Fcapacitor
ontheinputisrecommended.
iftheoutputpowerfromonedcp02isnotsufficient,
itispossibletoparalleltheoutputsofmultiple
dcp02s,asshowninFigure9.又一次,thesync
featureallowseasysynchronizationtoprevent
电源-railbeatfrequenciesatnoadditionalfiltering
费用.
figure8.connectingdualoutputsinseries
figure9.connectingmultipledcp02sinparallel
7
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