Programmable DC Electronic Load Model 63600 Series

The 63600 series DC electronic loads are mainly used for the testing of A/D power supplies, D/D converters, chargers, batteries, server power supplies, and some power electronic components, etc. In addition, for R&D departments, mass production, and some incoming material inspection applications, the 63600 can show its excellent performance.

The 63600 utilizes new DSP technology to develop the first Constant Zero Impedance (CZ) mode of operation, which simulates the actual pulling condition of non-linear loads. 63600 series can pull its rated current at a low voltage (0.6V). This feature retains its optimal pull-down capability for Point-of-Load D/D testing and fuel cell testing.

The 63600 series can simulate a wide range of dynamic load applications with programmable pull current alignment, current creepage/decrease, duration, and Von point voltage, etc. The 63600 series also has an automatic frequency sweep function (i.e., load simulation at different frequencies) to meet the needs of ATX power supplies. The 63600 also provides a 100-group memory that can be called upon at any time to recall the user's stored setpoints. In automated testing, this storage and call function can shorten the testing time.

The 63600 integrates real-time accurate voltage and current measurement with three file bits per module and up to 16-bit resolution. Users can do real-time voltage measurement and adjustment online, or use the front panel buttons to perform short-circuit simulation tests. The 63600 series electronic loads can be easily operated and set up through the front panel OLED display and knobs, and can be remotely controlled through Ethernet, USB, and GPIB interfaces. 63600 also includes routine self-diagnostic functions and over-power, over-current, over-temperature protections and over-voltage alarms, as well as positive and negative reverse polarity alarms, which provide comprehensive protection to ensure that the 63600 series loads can be operated and adjusted online, and can be short-circuit simulated using the front panel buttons. This full range of protection features ensures the quality and reliability of the 63600 series.

Chroma's 63600 series of programmable electronic loads incorporate a digital signal microprocessor (200MHz) in each module, allowing for optimized speed and control performance when multiple modules are used. All modules can be operated individually or remotely. Simultaneous pull tests can be performed to simulate real-world pull conditions under multi-module conditions.

The modular design allows users to match any module of the same series with different needs. The mainframe 63600-5 can provide up to 10 channels of 100W when equipped with five 63610 modules, and up to 2kW when connected in parallel with five 63640 modules. In addition, when five 63640 modules are connected in parallel, the pulling capacity can be as high as 2kW. 63600's high pulling capacity makes it an excellent choice for testing multi-output switching power supplies and other power products. In addition, GO/NG determination, in the automated test line, can immediately determine the product Pass or Fail, and the GPIB address is shared among five modules, which is conducive to synchronization, fast module control and readback of operational data.

The 63600 series has constant voltage, constant current, constant resistance, constant power, and constant impedance modes of operation to meet a wide range of test requirements. For example, the constant voltage mode can be used for battery charger charging test.

The 63600 series offers three load operating ranges with built-in 16-bit high-precision A/D converters that measure voltage 0.025%+0.01%F.S., current 0.05%+0.05%F.S., and power 0.1%+0.1%F.S. The 63600 series is designed to meet the requirements of ENERGY STAR® and 80 Plus standards for measuring efficiency and other important parameters. S. The high accuracy is essential for measuring efficiency and other important parameters of the object under test, and the measurement accuracy also meets the requirements of ENERGY STAR® and 80 Plus.

In addition to high-precision measurement, the 63600 series can also measure the voltage and current of overcurrent protection and overload protection. In addition, the 63600 series also provides users with the ability to set the step current for overcurrent protection testing, and determine the test result as Pass or Fail on the stand-alone machine, and the maximum power value (Pmax) during the test process can also be captured and displayed on the monitor automatically. The maximum power value (Pmax) during the test can be automatically captured and displayed on the display.

In addition to high measurement accuracy, the 63600 series also has two built-in high-speed A/Ds that can simultaneously measure voltage and current and calculate the actual power value so that the displayed power value is not distorted.

The 63600 series has 100 built-in programmable load timings that allow the user to simulate a variety of different real-world pulling conditions. In addition, each module can be operated independently or synchronously, so each module can execute its own timing independently and start pulling loads together synchronously. The following are examples of common programmable timing applications.

In the fast era, electronic components are designed for high-speed operation, so the performance requirements of power components for transient signals and dynamic response are much higher than in the past. To meet these test applications and requirements, the 63600 series offers high speed, programmable dynamic loads, and dynamic frequency sweep sweep mode.

The following figure shows the programmable parameters: set current high/low alignment, T1/T2, climb rate/descent rate and number of executions.

In addition to the basic parameters mentioned above, a new function that allows you to set the number of repetitions for a certain period of time, ranging from 1 to 65535, is also available, which is ideal for testing the instantaneous high-current tolerance of D/D converters.

Dynamic pull-load mode provides a unique simulation function that allows the user to set the number of repetitions over a period of time in the range of 1 to 65535. This function is ideal for applications that test the degree of instantaneous high current tolerance of D/D converters.

The 63600 also offers a unique Dynamic Frequency Sweep mode (shown in Figure 1) that linearly varies its pull-down frequency up to 50kHz, which allows for the measurement of worst-case maximum/minimum voltage peaks of the object to be measured. The sampling rate of this dynamic frequency sweep function is 500kHz, and Figure 2 shows an example of the maximum/minimum voltage peaks. Dynamic Load Mode simulates a wide range of different load scenarios and meets the needs of most users. And the 63600's remote load sensor and control circuitry ensure that waveform distortion is minimized under dynamic load operation.

According to the Intel ATX 12V Design Guide, when testing the outputs of the power supply, such as +12VDC, +5VDC, and +3VDC, synchronized dynamic pulls are required to test whether the power supply can operate normally under the most severe conditions. The 63600 series provides this dynamic synchronized pull function, which can provide synchronized pull for six groups of power supply outputs in one frame. In addition, in the case of four frames, the number of synchronized dynamic pulling channels can be up to 40 groups. Such flexible module application can increase the utilization rate of each module with the most economical module matching.

In addition to the dynamic pull-load function, for high-power server power supply, it can be synchronized dynamic pull-load of each module in parallel to meet the high-power pull-load application, and the total power of the modules in a frame can be up to 2,000 W dynamic synchronous pull-load.Figure 3 shows the synchronous dynamic waveforms of the modules in parallel, and Figure 4 shows the asynchronous dynamic waveforms of the modules in parallel. In the case of synchronized dynamic pull, the measured voltage peak (Vpeak) is the correct value. In the case of unsynchronized dynamic pull, the measured voltage peak will be the wrong value.

The 63600 has an intelligent master/slave control mode, when the load power demand increases, it can be connected in parallel (master/slave control) to achieve the required current and power. When set to master/slave control mode, all the modules set to master/slave control form a single load, the user only needs to program the load current on the master module, and the master module will automatically distribute the current to other modules after calculation, which can greatly simplify the user's operation steps. 63600 is equipped with a USB standard interface, GPIB optional interface and Ethernet optional interface, which allows users to use these interfaces for remote control and its power supply. The 63600 is equipped with USB standard interface, GPIB optional interface and Ethernet optional interface, through which users can carry out remote control and other automatic test applications.

Users can record the instantaneous waveforms of voltage and current through the digital capture function of the 63600. The digital capture function allows users to operate more conveniently and saves users' time.

The following are specifications for setting parameter values.

• Sampling time: 2 microseconds ~ 40 milliseconds / Resolution: 2 microseconds (set sampling time frame)
• Sampling points: 1~4096 (set total sampling points)

In addition to the general fixed-current, fixed-voltage, fixed-power, fixed-resistance pull-load mode, in the pull-load arbitrary waveforms, the general traditional way is through the computer will be pre-stored waveforms through the DAQ card or simply through the arbitrary waveform generator will be sent to the electronic load for pulling the waveform to achieve the purpose of pulling the load of arbitrary waveforms, as shown in the following figure.

However, the 63600 series provides another more convenient option - user-defined waveforms, which can simulate the real pull current. The actual current waveform data captured by the oscilloscope or the edited current waveforms can be easily stored in the internal Random Access Memory (RAM) of each module of the 63600 series through the graphical operation software, and then any waveforms defined by the user can be pulled, which saves the cost of DAQ cards or waveform generators, as shown in the figure below. Each module of the 63600 series provides 10 sets of storage space for waveforms and up to 1.2 million waveform points, which is sufficient to provide the required testing.

In addition, while pulling the actual current, the 63600 series also provides the positive and negative values of the maximum peak voltage that occurs during the pulling process, so that the user does not need to observe the voltage changes through an oscilloscope, which greatly saves the time required to confirm the voltage peaks with an oscilloscope.

The 63600's modules have three load operation ranges, each with a minimum operating voltage of 0.6V at full load, and a maximum rated current that can be drawn depending on the current of each range. This low-voltage operation design is suitable for testing D/D converters, fuel cells and other low-voltage-high-current components. In addition, for operation between 0V and 0.6V*, please refer to the V-I curve on the right for the amount of current that can be pulled.