Constant Current Mode And Lin Mode Application; Fig 5-3 Constant Current & Mode Application - Prodigit 3270 Series Operation Manual

5-3. Constant Current mode and LIN mode application

The Constant Current (CC) mode is ideal for testing the Load Regulation, Cross Regulation,
Output Voltage and Dynamic Regulation of the power supply under test. The CC mode can
also be used to test the Discharge Characteristics and the Life Cycle of cells and battery
packs. In CC operation the 3270 series can operate as a static load with switchable high
and low current levels. It is also possible to operate the load dynamically enabling the user
to adjust sink current with time.
Linear C.C. Mode
During Linear C.C. mode, the load current input into 3270 Series High Power Electronic
Load depends on the current setting regardless of the input voltage, e.g., the current setting
remains unchanged. The load input current signal will follow input voltage signal that is
useful for step wave-form and square wave-form device.
The LIN mode is within a AGC circuit and the control signal will response with input voltage.
We call it LIN mode.
The AGC circuit produces a constant amplitude output signal so long as the amplitude of
the input signal exceeds an adjustable reference voltage applied to the peak detector. The
reference voltage may be changed to change the range of input voltage resulting in a
constant-amplitude output.
The AGC circuit responds almost instantly to control a sudden increase in input voltage.
The AGC circuit is especially suitable for Step waveform, Square waveform and the input
voltage with distortion waveform.
VOLTAGE
SOURCE
ELECTRONIC LOAD
CC MODE
- +
DC
INPUT
Fig 5-3 constant CURRENT & mode application
3270 Series Operation Manual 119
VOLTAGE
SOURCE
ELECTRONIC LOAD
CC MODE
I
HIGH
I
LOW
-
+
DC
INPUT