Power Electronics / Power Management


Programmable power supplies

6 July 2011 Power Electronics / Power Management

The PSW series from GW Instek is a single-output, multirange programmable switching DC power supply covering a power range up to 1080 W. The product range includes six models with 30 V and 80 V rated voltages and 360 W, 720 W and 1080 W maximum output powers.

The units’ multirange feature allows the configuration of voltage and current within the rated power range. As they can be connected in series for maximum two units or in parallel for maximum three units, the capability of connecting multiple units for higher voltage or higher current output provides a broad coverage of applications. The power supplies can operate in constant current mode or constant voltage mode.

The adjustable slew rate of the PSW series allows users to set for either output voltage or output current a specific rise time for the low to high level transition, and a specific fall time similarly. This facilitates the characteristic verification of a DUT during voltage or current level changes with controllable slew rates. An output on/off delay feature enables the setting of a specific time delay for output on and off. This is especially useful when multiple PSW units are used to generate various outputs with specific on/off time relations. This multiple-output control can be done through the analog control terminal at the rear panel or via PC programming with standard commands.

The power supplies are equipped with a bleed resistor at the power output terminal, which can quickly discharge the internal filter capacitors when the power supply is turned off and the load is disconnected. OVP and OCP protections are provided, both of which can be selected within the range of 10% to 110% of the rated voltage/current of the power supply.

The PSW series provides USB host/device and LAN interfaces as standard and GPIB-USB optional. The LabView driver and the data logging PC software are supported on all interfaces.



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