In Lighting Drive Circuit

In recent years, fluorescent and incandescent lamps have been gradually replaced by longer-life, lower-energy LED lamps. In order to further improve the efficiency of LEDs, engineers are working to improve the power conversion efficiency of LED driver circuits (drive modules). Engineers need to measure the electrical parameters of the drive circuit.


Automotive in lighting drive circuit


Key requirements

  • Evaluating the LED driver circuit requires a multi-channel, high-precision, wide-bandwidth power analyzer.
  • Wide input ranges of voltage and current, can test a variety of supply voltages, and can also test electrical parameters in normal and standby states
  • Display values and waveforms or values and trends simultaneously
  • Overall evaluation of current consumption, power consumption and efficiency
  • Harmonic analysis

automotive drive circuit switching regulator


The WT5000 advantage

Multiple channels and high accuracy

  • Up to 7 power channels make it easy to evaluate the current, power and efficiency of LED drive circuit.
  • Bandwidth: 5MHz for current, 10MHz for voltage
  • Power accuracy: 0.01 % of rd + 0.02 % of fs (50/60Hz) 0.02 % of rd + 0.05 % of fs (DC)

Wide input ranges of voltage and current

  • Voltage range: 1.5/3/6/10/15/30/60/100/150/300/600/ 1000V, 1500VDC
  • Current Range: 5m/10m/20m/50m/0.1/0.2/0.5/1/2/5A for 5A module 0.5/1/2/5/10/20/30A for 30A module

Flexible display form, displayed independently or in combination

  • Data such as values, waveforms, trends, harmonic lists, etc. can be displayed. It can also display the combination of “Value + Waveform”, “Value + Trend”, etc., while viewing the values, it is also possible to check the dynamics of each parameter.

Harmonics and dual harmonics

  • Fundamental frequency of WT5000 is from 0.1Hz up to 300kHz.
  • Max. order of harmonics: 500th order
  • Simultaneously measure harmonic parameters on two different fundamental frequencies.

Yokogawa WT5000 Precision Power Analyzer

The New Yokogawa WT5000 is the first of a new generation of Precision Power Analyzer that offers exceptional measurement accuracy of ± 0.03% combined with stability, noise immunity and plug-in modular flexibility to meet the measurement needs of today’s developers of energy-efficient systems.

In rapidly evolving industry sectors like electric vehicles, renewable energy and energy efficient technologies, the need for reliability in testing to enhance safety, efficiency and performance has never been greater. Changing application needs and evolving international standards call for custom measurements and consistent accuracy, and in the WT5000 Precision Power Analyzer, engineers have a versatile platform that not only delivers reliable measurements today, but is ready for the challenges of tomorrow.


Speak to a Technical Sales Engineer

Need to ask a few questions before deciding on the best T&M solution for your application? Leave us a message and one of our technical sales engineers will be in touch.


With our application experience and expertise, our team of technical engineers will listen to your design and research challenges and provide you with the right instruments and solutions for your application.

Speak to a electronics test and measurement technical sales engineer

* Required Fields