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HCPL-314J-000E Datasheet(PDF) 11 Page - AVAGO TECHNOLOGIES LIMITED

Part # HCPL-314J-000E
Description  0.4 Amp Output Current IGBT Gate Drive Optocoupler
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Manufacturer  AVAGO [AVAGO TECHNOLOGIES LIMITED]
Direct Link  http://www.avagotech.com
Logo AVAGO - AVAGO TECHNOLOGIES LIMITED

HCPL-314J-000E Datasheet(HTML) 11 Page - AVAGO TECHNOLOGIES LIMITED

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Applications Information
Eliminating Negative IGBT Gate Drive
TokeeptheIGBTfirmlyoff,theHCPL-314Jhasaverylow
maximumVOLspecificationof1.0V.MinimizingRgand
theleadinductancefromtheHCPL-314JtotheIGBTgate
andemitter(possiblybymountingtheHCPL-314Jona
small PC board directly above the IGBT) can eliminate
theneedfornegativeIGBTgatedriveinmanyapplica-
tionsasshowninFigure19.Careshouldbetakenwith
suchaPCboarddesigntoavoidroutingtheIGBTcollec-
tororemittertracesclosetotheHCPL-314Jinputasthis
canresultinunwantedcouplingoftransientsignalsinto
theinputofHCPL-314Janddegradeperformance.(Ifthe
IGBT drain must be routed near the HCPL-314J input,
thentheLEDshouldbereversebiasedwhenintheoff
state,topreventthetransientsignalscoupledfromthe
IGBTdrainfromturningontheHCPL-314J.)Anexternal
clampdiodemaybeconnectedbetweenpins14&15
andpins9&10(asshowninFigure19)fortheprotec-
tionofHCPL-314JinthecaseofIGBTsswitchinginduc-
tiveload.
Figure 19. Recommended LED Drive and Application Circuit for HCPL-314J.
+ HVDC
3-PHASE
AC
0.1 µF
FLOATING
SUPPLY
VCC = 18 V
1
3
+
2
16
14
15
270
HCPL-314J
+5 V
CONTROL
INPUT
Rg
74XX
OPEN
COLLECTOR
GND 1
7
6
8
10
11
9
- HVDC
0.1 µF
VCC = 18 V
+
Rg
270
+5 V
CONTROL
INPUT
74XX
OPEN
COLLECTOR
GND 1
VOL


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