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HCPL3140 数据表(PDF) 11 Page - Agilent(Hewlett-Packard)

部件名 HCPL3140
功能描述  0.4 Amp Output Current IGBT Gate Drive Optocoupler
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制造商  HP [Agilent(Hewlett-Packard)]
网页  http://www.home.agilent.com
标志 HP - Agilent(Hewlett-Packard)

HCPL3140 数据表(HTML) 11 Page - Agilent(Hewlett-Packard)

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11
+ HVDC
3-PHASE
AC
- HVDC
0.1 µF
VCC = 15 V
1
3
+
2
4
8
6
7
5
HCPL-3140/HCPL-0314
Rg
Q1
Q2
270
+5 V
CONTROL
INPUT
74XXX
OPEN
COLLECTOR
Applications Information
Eliminating Negative IGBT Gate
Drive
To keep the IGBT firmly off,
the HCPL-3140/HCPL-0314 has a
very low maximum VOL
specification of 1.0 V. Minimizing
Rg and the lead inductance from
the HCPL-3140/HCPL-0314 to
the IGBT gate and emitter
(possibly by mounting the
HCPL-3140/HCPL-0314 on a
small PC board directly above the
IGBT) can eliminate the need for
negative IGBT gate drive in many
applications as shown in
Figure 19. Care should be taken
with such a PC board design to
avoid routing the IGBT collector
or emitter traces close to the
HCPL-3140/HCPL-0314 input as
this can result in unwanted
coupling of transient signals into
the input of HCPL-3140/
HCPL-0314 and degrade
performance. (If the IGBT
drain must be routed near the
HCPL-3140/HCPL-0314 input,
then the LED should be reverse
biased when in the off state, to
prevent the transient signals
coupled from the IGBT drain
from turning on the HCPL-3140/
HCPL-0314.)
Figure 19. Recommended LED Drive and Application Circuit for HCPL-3140/HCPL-0314.


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