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PSW Description
The PSW-Series is a single output multi-range programmable switching
DC Power Supply covering a power range up to 1080W. This series of products include six models with the combination
of 30V and 80V rated voltages and 360W, 720W and 1080W maximum output powers. The multi-range feature allows
the flexible and efficient configuration of voltage and current within the rated power range. As the PSW-Series
can be connected in series for maximum 2 units or in parallel for maximum 3 units, the capability of connecting
multiple PSW units for higher voltage or higher current output provides a broad coverage of applications. With
the flexibility of multi-range power utilization and series/parallel connection, the PSW Series significantly
reduces the user’s investment for various power supply products to accommodate the projects with different power
requirements.
The CV/CC priority selection of the PSW-Series is a very useful feature for DUT protection. The conventional
power supply normally operates under CV mode when the power output is turned on. This could bring a high inrush
current to the capacitive load or current-intensive load at the power output-on stage. Taking the I-V curve
verification of LED as an example, it becomes a very challenging task to perform this measurement using a conventional
power supply. With LED connected to a power supply under CV mode as the initial setting, when the power output
is turned on and the voltage rises to the LED forward voltage, the current will suddenly peak up and exceed
the preset value of current limit. Upon detecting this high current, the power supply starts the transition
from CV mode to CC mode. Though the current becomes stable after the CC mode is activated, the current spike
occurred at the CV and CC crossover point may possibly damage the DUT. At the power output-on stage, the PSW-Series
is able to run under CC priority to limit the current spike occurred at the threshold voltage and therefore
protect DUT from the inrush current damage.
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