HV supplies enable safe breakdown testing at up to 10 kV
This includes devices made of current- and next-generation wide-bandgap materials such as silicon carbide (SiC) and gallium nitride (GaN). Other options on the market for sourcing 10 kV lack many capabilities built into Series 2290. For example, some don’t include a communication interface as standard equipment, don’t offer an available protection module, or produce significantly higher output ripple than the Series 2290 supplies.
Series 2290 power supplies are stand-alone voltage sourcing instruments that make it economical to create a high voltage test solution. For materials researchers and semiconductor device developers involved in creating and characterising very high voltage materials and devices, the Series 2290’s maximum voltage output levels of either 5 kV or 10 kV complement Keithley’s Model 2657A High Power System SourceMeter Source Measure Unit (SMU) Instrument, which provides source voltages up to 3 kV. Series 2290 supplies can also be used in conjunction with test systems that include a Keithley Model 4200-SCS Parameter Analyser and/or Parametric Curve Tracer configurations for more complex applications that require testing at up to 10 kV.
When making leakage current or high resistivity measurements with sensitive measurement instruments, a power supply with low output noise is essential. Both Series 2290 power supplies’ extremely low noise performance allows sensitive instruments to measure current accurately down to picoamp levels. The Model 2290-10’s maximum output ripple is less than 1 VRMS; the Model 2290-5’s is 100 mVRMS. Two selectable internal filters in the Model 2290-5 allow reducing its output ripple to only 3 mVRMS, the lowest noise output in the industry.
To prevent overvoltage damage to lower voltage instrumentation configured into the same test system as a Series 2290 power supply, Keithley has also introduced the Model 2290-PM-200 10 kV Protection Module. When low voltage instruments, such as many of Keithley’s SMU instruments, are used in a high voltage test circuit with a Series 2290 power supply to make accurate leakage current measurements, the protection module safely clamps the voltage across the sensitive instrument to a maximum value of 200V, even if the device under test (DUT) breaks down and effectively becomes a short. The power supplies, the protection module, sensitive instrumentation, and Keithley software and accessories bring together all the elements needed to create a safe, high voltage test environment.
Both Series 2290 power supplies have a built-in interlock circuit to disable the output voltage if a high voltage test fixture’s access door is not closed, a critical feature not available in all competing products. In addition, they have low voltage analogue outputs to allow for safe monitoring of the high voltage and the output current. Keithley has developed LabVIEW and IVI drivers for the Series 2290 to speed and simplify test system development. The IEEE-488 interface provided standard in the Series 2290 simplifies creating automated high voltage test systems and enhances safety by allowing the high voltage instrumentation to be controlled remotely.
In addition to high voltage outputs, the Model 2290-5 can output up to 5 mA of current (25W) and the Model 2290-10 can output up to 1 mA (10W). Both offer 1 µA current measurement resolution. The front panels of these instruments provide voltage and current output displays, as well as a third display that shows the user’s choice of four settings: output voltage, voltage limit, current limit, or current trip.
Keithley; www.keithley.com/data?asset=57875
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
