Information subject to change
96-8006123_11-03-2021
8302 OPERATOR’S MANUAL – SECTION 6
18
When operating in Controlled-Current (CC) mode,
a compensation circuit is required to ensure ac
-
curate output current. Since the load is a critical
circuit component in CC mode, the inductive and
resistive values of the load will determine the re-
quired compensation values.
One of the two compensation settings that can be
enabled with DIP switch settings will be sufficient
for most applications. If you determine that neither
Compensation Network 1 or Compensation Net
-
work 2 will be adequate for your application and
load, please contact
AE Techron Technical Sup-
port
for additional compensation options.
The following section describes methods for
determining proper compensation setting for your
application when operating in Controlled-Current
mode.
6.2.2 Selecting Compensation for
CC Operation
AE Techron 8302 amplifiers can be configured for
either Controlled Voltage (CV) or Controlled Cur
-
rent (CC) mode of operation. When operating the
amplifier in Controlled Voltage (CV) mode, com
-
pensation is not required. However, when operat
-
ing in Controlled Current (CC) mode, the amplifier
load becomes an integral part of the system. In
order to ensure system stability and to control
available bandwidth, compensation via an RC
network is required for CC operation. The following
steps will show you how to determine the proper
compensation network for your load to allow you
to operate your amplifier in CC mode safely and
effectively.
We recommend that you power-up and enable the
amplifier in Controlled Voltage mode without at
-
taching a load before configuring your amplifier for
Controlled Current operation. This will allow you
to verify that the input signal and the amplifier are
operating correctly.
Once this initial check is completed, power down
the amplifier, attach your load, and move the back-
panel Operation Mode DIP switch (SW#4) to the
DOWN position to place the amplifier in CC mode.
Figure 6.3 – Input to Output Comparison,
Controlled-Current Operation
6.2.1 Safety and Operation Consider-
ations for Controlled Current Operation
When an AE Techron amplifier is configured as
a Controlled-Current source, care needs to be
exercised in its operation.
Any voltage controlled
current source should never be turned on
without a load, (with some impedance, real or
effective) connected to its output terminals.
When asked to operate in this way, any current
source (including an AE Techron amplifier) will in
-
crease its output voltage in an attempt to drive the
requested current into the load. In an open-circuit
condition, creating current flow will be impossible.
The current source will increase its output voltage
until it reaches its voltage limit. This is a potentially
dangerous condition for both the AE Techron am
-
plifier and for any user who might come in contact
with the amplifier output terminals.
Likewise, operation in Controlled Current mode
into a load that is completely resistive is
NOT rec-
ommended.
The load must have some inductance
for Controlled Current mode to operate correctly.
STEP 1: Check Amplifier Operation in CV mode.
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