Specifications

Expansion Capabilities
The input attenuator module incorporates a parallel pin permitting power expansion as long as
the total output power from the DC-DC converters does not exceed the power rating of each
input attenuator module (EMC specifications are guaranteed for up to two input attenuators in
parallel). It is necessary to include a 100 ohm, 1/4W resistor between the minus outputs of the
attenuator modules to ensure equal potential at these points when paralleling input attenuator
modules, so as not to impact the effectiveness of the internal common-mode choke.
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1-800-927-9474
14-4
Applications Manual
Figure 2.
External Components
for EMC Requirements
Figure 3.
IAM Multiple Driver
Interconnection
Driver/
Booster
C1
+ In
– In
Gate Out
Gate In
Connection to module baseplate
or ground plane
connected to baseplate
4700 pF
4700 pF
+ Out
– Out
– S
+ S
Trim
To VI-IAM
D1
D2
D2
C2
C2
IAM
Gate Out
Parallel
Gate In
+Out
-Out
-In
-In
+In
+In
D1, D2, D3: 1N4148*
C2: 470 pF/500V
D1
-Out
-S
Trim
+S
+Out
+In
Gate
In
Gate
Out
-In
Driver
+
–
* For bus voltages greater than 75V,
a 1N4006 diode should be used for the
diodes (D3) connected to the Gate In pins.
-Out
-S
Trim
+S
+Out
+In
Gate
In
Gate
Out
-In
Driver
-Out
-S
Trim
+S
+Out
+In
Gate
In
Gate
Out
-In
Driver
D3
D3