SpikeSafe DC / Continuous Pulse Current Sources

Vektrex SpikeSafe™ DC / Continuous Pulse (DCP) Current Sources provide reliable DC or pulsed drive for LED or laser diode reliability testing, IESNA LM-80 maintenance testing, and other test applications requiring DC or continuous pulse current. Models support currents from 339µA to 60A and max compliance voltages from 50V to 400V. All models feature individual channel control, accurate pulsing over long output cables, precise current, precision pulsing for improved measurement repeatability, and high power density — typically 6.4kW-8kW.

  • 1-8 independent channels / model
  • High current, up to 60A
  • Compliance voltages to 400V
  • Pulse width range: 10µs to 15000s
  • Pulse synchronization across multiple channels
  • 0-100% duty cycle
  • Modulated current option supports arbitrary current waveforms
  • Energy efficiency > 96%
  • Form factors include rackmount, benchtop or integrated system
  • MTBF > 175,000 hours

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What Current Do You Need?

Low CurrentMid CurrentMid-High CurrentHigh Current

Accurate Pulsing Over Long Cables

Adjustable load tuning allows the SpikeSafe to compensate for load conditions, cable impedance, and length. The resulting fast, clean pulses have little overshoot – even with output cables over 10 meters long. Using the SpikeSafe DCP makes it easy to duplicate real-world pulsed operation test conditions – for example 720 Hz PWM operation at 1% duty cycle.

Twisted Pair Output Wiring Simplifies System

Unlike other pulsed sources that require exotic coaxial or flat ribbon output cables, the SpikeSafe 400 utilizes simple, low-cost twisted pair output wiring. For high current models, drive current is split into multiple output pairs, assuring the maximum current per conductor is below 7.5A. This design feature allows the current output to be routed through commonly used interconnect devices such as printed circuit card edge connectors.

No Duty Cycle Limitations

The SpikeSafe 400 uses continuous power conversion to translate input bulk DC power into clean output current pulses. This on-demand regulation approach eliminates the need for bulky storage capacitors and it is one of the reasons that the SpikeSafe has such high power density. But more importantly, it means no duty cycle or pulse width limitations. Pulsing from 1% to 100% duty cycle is supported up to the full voltage and current limits of the model.

Modular, Scalable

SpikeSafe current sources are easily combined into systems with up to 1,024 current source channels in an electronics cabinet. Scalable, modular design enables easy system expansion for increased capacity. With a full range of SpikeSafe current source options, system components, chambers, fixturing, load board designs, cabling and software, Vektrex can provide the ideal testing solution for any size lab – large or small.

Vektrex DC / Continuous Pulse Current Source System Configuration Options
Vektrex DC / Continuous Pulse Current Source System Configuration Options


Vektrex’s easy-to-use SpikeSafe Test and Reliability Software (STARS) controls and monitors sources, loads, and thermal control devices during testing. With STARS, long-term reliability and burn-in tests can be automated and unattended. STARS supports independent source channel startup and shutdown, allowing multiple LED batch runs on a single system for optimized throughput. Stand-alone STARPLOT plotting software provides a graphic view of voltage, current and temperature data to quickly identify and illustrate trends.

Protects Devices

Vektrex’s patented SpikeSafe load protection continuously monitors voltage and current patterns and instantly shuts down when anomalies are detected. Rapid shutdown preserves the failed device for analysis, and it protects other devices in the circuit. The result is lower failure counts and improved reliability statistics.

Energy Efficiency

SpikeSafe current sources operate at 96% conversion efficiency. This high efficiency reduces electricity usage and it minimizes the heat released into the laboratory. In addition, the current sources’ high compliance voltage capability and SpikeSafe load protection allow many devices to be tested in one series circuit. This configuration is much more efficient than traditional single device circuits. The net result is lower annual operating cost and lower total cost of ownership.


  • Reliability Testing
  • Device Burn-in Test (DC or Pulsed)
  • HASS and LM-80 Applications
  • Energy Star Certification
  • Stress Testing
  • Cell Phone Flash Emulation
  • Rectifier Ripple Emulation
  • Calibration Lamp Drive
  • DC Driven Lamps
  • Resistor Aging
  • Laser Diode DC Drive

For light measurement applications, visit the SpikeSafe Performance Series Current Sources page.

Typical Devices Used with SpikeSafe DC / Continuous Pulse Current Sources

  • Low, Mid and High-Power LEDs, Arrays, Modules, and Chip-On-Board (COB) devices
  • VCSEL, Quantum Cascade, Bar Lasers
  • Resistors
  • Rectifier Diodes
  • Halogen, Tungsten, FEL Lamps

Worldwide Installation Base

4 out of 5 major LED manufacturers standardize on SpikeSafe Current Sources.

Over 40% of LM-80 laboratories worldwide use SpikeSafe current sources to drive their LEDs, including labs in Germany, China, USA, Korea, Taiwan, Hong Kong, Malaysia.