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 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.
The adjustable slew rate of the PSW-Series allows user to set for either output voltage or output current a specific rise time at the low to high level transition, and a specific fall time at the high to low level transition. This facilitates the characteristic verification of a DUT during voltage or current level changes with controllable slew rates. The manufacturing tests of lighting device or large capacitor during power output-on are mostly 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 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 level 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 and GPIB-USB adaptor, RS232-USB 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.
PSW-Series Multi-Range DC Power Supply
|PSW 30-36||I||0 ~ 30V||0 ~ 36A||360W|
|PSW 30-72||II||0 ~ 30V||0 ~ 72A||720W|
|PSW 30-108||III||0 ~ 30V||0 ~ 108A||1080W|
|PSW 80-13.5||I||0 ~ 80V||0 ~ 13.5A||360W|
|PSW 80-27||II||0 ~ 80V||0 ~ 27A||720W|
|PSW 80-40.5||III||0 ~ 80V||0 ~ 40.5A||1080W|
|PSW 160-7.2||I||0 ~ 160V||0 ~ 7.2A||360W|
|PSW 160-14.4||II||0 ~ 160V||0 ~ 14.4A||720W|
|PSW 160-21.6||III||0 ~ 160V||0 ~ 21.6A||1080W|
|PSW 250-4.5||I||0 ~ 250V||0 ~ 4.5A||360W|
|PSW 250-9||II||0 ~ 250V||0 ~ 9A||720W|
|PSW 250-13.5||III||0 ~ 250V||0 ~ 13.5A||1080W|
|PSW 800-1.44||I||0 ~ 800V||0 ~ 1.44A||360W|
|PSW 800-2.88||II||0 ~ 800V||0 ~ 2.88A||720W|
|PSW 800-4.32||III||0 ~ 800V||0 ~ 4.32A||1080W|
More details, please follow PSW-Series brochure.
Applications and Solutions - The setting of Test Script
Test Script Setting Procedures: (Using a PSW as an example):
1. Download t001.csv and t001.tst from GW Instek website
2. Save t001.csv and t001.tst to your USB’s root directory and confirm the saved file names are identical in your USB flash drive
3. Open t001.csv provided by GW Instek and edit output voltage, current, time, cycle, etc. for step1~step9. Please refer to the following chart. For cycle setting, first of all, set the step numbers for Start and End. Start and End should be placed corresponding to the step positions.
After filling the Excel chart with the parameters, users can quickly obtain a sequential power output as shown below.
From the above output example, each step is a setting and there are 9 steps to make up a cycle. The set cycle was repeated for two times.
Settings for power supply: (For demonstration purpose, this example only planned 9 steps, please see Test Script features below for its full capability.)
Features of GW Instek Test Script:
Setting: Capable of editing up to 20,000 settings
Cycle: Capable of setting 1 billion or infinite cycles
Duration time: Each setting can be set from 50ms to 20 days
Settings for power supply:
Step 1 Set output Off for two seconds
Step 2 Set 80V/ 7A output for 10 seconds
Step 3 Set 20V/3.5A output for 3 seconds
Step 4 Set 75V/8A output for 5 seconds
Step 5 Set 30V/10A output for 2 seconds
Step 6 Set 45V/10A output for 4 seconds
Step 7 Set 50V/10A output for 2 seconds
Step 8 Set 10V/10A output for 1 second
Step 9 Set 70V/20A output for 5 seconds. Determine whether the cycle number reaches 2.
(End Test Script if the cycle number is 2. If the cycle number is less than 2, repeat step1~step9.)
Test Script Parameter Definition:
i. OVP: over voltage protection setting. MAX: Maximum value by default；MIN: Minimum value by default
ii. OCP: over current protection setting. MAX: Maximum value by default；MIN: Minimum value by default
iii. Set Bleeder to 1 to activate bleeder control。(This function is to assist DUT to quickly discharge) Set Bleeder to 0 to deactivate bleeder control
iv. IV mode:
CVHS: Set PSW under CV priority mode, voltage rising and falling are at the fastest mode (slew rate setting for voltage and current is invalid)
CCHS: Set PSW under CC priority mode, current rising and falling are at the fastest mode (slew rate setting for voltage and current is invalid)
CVLS: Set PSW under CV slew rate control mode, voltage rising and falling are operated by settings。
CCLS: Set PSW under CC slew rate control mode, current rising and falling are operated by settings。
Cycle: Set the number of cycles (To execute infinite cycles please set the number of cycles to 0)
4. The following dialogue box will appear when you save or close the file. Please click “yes”to maintain this format.
5. After saving the file, please insert USB to the USB port on the front panel of PSW and wait for 5 seconds. (MS appearing on the display represents USB has been read)
6. Press test key on the front panel of PSW to enter Sequence function settings.
7. Use voltage knob to select T-02, then use current knob to select desired memory location (1~10) and press voltage knob to save the file to PSW.
Note: If .csv file name is t001 please select memory location(number) 1. If .csv file name is t002 please select memory location 2 and so on.
8.Use voltage knob to select T-01, then use current knob to select desired memory location (1~10) and press voltage knob to confirm execution setting. Press OUTPUT key, PSW will then output the previous edited settings.
9. Press voltage knob and then the following display will be shown to represent it is successfully entering the execution stand-by display. Press “output” to initiate operation. To pause operation, press “output” again. To resume operation, press “output”. To terminate operation and exit Test Script, press “Test”.
Note: If there is error messages as shown on the following displays please follow “Error Messages and Solutions”to amend t00x.csv file.。
(For example: Error 93→_SEQ_ERR__OCP_TOO_SMALL.) OCP setting is too small that is beyond the specifications. Settings should be within the specifications.)
GW Instek power supply models supporting Test Script are as follows:
|Download||The executable files of Test Scrip|
|Download||The operational menu of Test Script|
|Download||Error message list for Test Script|