Datasheet

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 fifteen models with the combination of 30V, 80V, 160V, 250V and 800V
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-Series 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
users’ cost for various power supply products to accommodate the projects with different power requirements.
The adjustable slew rate of the PSW-Series allows users to set for either output voltage or output current,
a specific rise time from low to high level transition, and a specific fall time from high to low level transition.
This facilitates the characteristic verification of a DUT during voltage or current level changes with controllable
slew rates. Most manufacturing tests of lighting device or large capacitor during power output-on are associated
with the occurrence of high surge current, which can greatly reduce the life time of the DUT. To prevent inrush
current from damaging current-intensive devices, a smooth and slow voltage transition during power On-Off can
significantly reduce the spike current and protect the device from high current damage.
The C.V/C.C priority selection of the PSW-Series is a very useful feature for DUT protection. The conventional
power supply normally operates under C.V 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 C.V 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 C.V mode to C.C mode. Though the current becomes stable after the C.C mode being activated,
the current spike occurred at the C.V and C.C crossover point may possibly damage the DUT. At the power
output-on stage, the PSW-Series is able to operate under C.C priority to limit the current spike occurred at the
threshold voltage and therefore protects DUT from the inrush current damage.
The OVP and OCP are provided with the PSW-Series. Both OVP and OCP levels can be selected, with default
level set at 110%, of the rated voltage/current of the power supply. When any of the protection levels is tripped,
the power output will be switched off to protect the DUT. The PSW-Series provides USB Host/Device and LAN
interfaces as standard, GPIB-USB adapter and RS232-USB cable as optional. The LabView driver and the Data
Logging PC software are supported on all the available interfaces. An analog control/monitoring connector is also
available on the rear panel for external control of power On/Off and external monitoring of power output Voltage
and Current.
Powerful Stretch with Multi-range Technology