IT8700P+ series high-speed multi-channel DC electronic load is an upgraded version of the original IT8700P series with higher speed and higher precision. Its modules support master-slave paralleling connection for power extension. It's compatible with IT8700P mainframe, the new modules and old modules can work together. The IT8700P+ modules have faster dynamic response and can make the minimum rise time of current less than rising time of minimum current < 10 μs. In addition, the low internal resistance makes it suitable for low-voltage loading test. Faster loop speed can accurately control current without overshoot which improves test efficiency. Furthermore, it has three current ranges for higher accuracy and lower ripple. The voltage and current measurement speed of this series has been upgraded to 250kHz. It has built-in LAN, USB and RS232 interfaces, and supports SCPI protocol. Therefore, IT8700P+ is good for system integration and is suitable for R&D and production line testing of super capacitors, fuel cells, lithium ion batteries, high-speed AC-DC and DC-DC power supplies such as computer power supplies and communication power supplies.
Features
♦ Three-stage current range, higher accuracy and lower ripple
♦ Supports master-slave parallel connection of 16-channel modules, flexibly extends power
♦ Faster dynamic response, minimum current rise time < 10 μs
♦ Ultra-low internal resistance, suitable for testing low-voltage capacitors, fuel cells, etc.
♦ Faster loop speed, precise control of current without overshoot
♦ The voltage and current measurement speed is upgraded to 250kHz, good for system integration
♦ Comprehensive protection functions: OVP/OCP/OPP/OTP, Sense protection
♦ Compatible with IT8700P mainframe, old and new modules can be matched
♦ Short-circuit peak current measurement function
♦ Available front/rear terminals*1
♦ 8 operating modes: CC/ CV/ CR/ CW/ CV+CC/ CR+CC/ CW+CC/ CV+CR (CR-LED)
♦ Automatic test function to tell whether the test results exceed the set specifications
♦ Built-in LAN, USB, RS232 interfaces
♦ CV loop speed is adjustable to match different DUTs
♦ Multi channel synchronous control
*1 Current is no more than 15A if connecting with front terminals
Application
Functions and Advantages
Flexible modules combination
The IT8700P+ series is designed with removable modules, so that you can choose different modules according to your needs. These modules can work with the original IT8700P series modules too. There are high-performance microprocessor chips in each load module and mainframe. Parallel architecture is adopted to achieve faster testing. The load modules are controlled synchronously by the system, and the power supply with multiple outputs can also be tested synchronously.
Low voltage loading, stable operation down to zero volts
The IT8700P+ module has ultra-low on-resistance and three ranges. Under the medium and small range, the minimum load voltage is <0.1V. In the high current range, the minimum load voltage at full current is <0.5V, and lower input impedance can be obtained after parallel connection. It is suitable for testing fuel cells, supercapacitors, solar cells, DC-DC converters and other low voltage and high current electronic devices.
Fast dynamic response
Power supplies often have high requirements for instantaneous signals and dynamic response. In order to meet faster and faster testing requirements, IT8700P+ series provides high-speed, programmable dynamic sequence control. The current rise time is no more than 10 μs, much faster than the last generation. So it can be used for high-speed dynamic test of communication power supply and computer power supply. There are three modes of the dynamic test function, namely continuous mode, pulse mode and toggle mode.
8 operation modes
Besides the four basic operation modes of CC/CV/CR/CW, IT8700P+ provides additional 4 compound operation modes : CV/ CC/ CR+CC/CW+CC/CV+CR(CR-LED). Under CV/CR/CW operation mode, the maximum current (I-Limit) is settable.This can effectively solve the problem of instantaneous surge current during testing and avoid triggering DUT's protection, or even burning out or any other injury caused by possible misoperation or environmental factors. So it can be used in various applications.
Peak voltage measurement(Vpk)
When measuring the dynamic current of a switching power supply, an oscilloscope was usually necessary to capture the instantaneous voltage and current waveforms and obtain Vpk+ and Vpk- accordingly. But with digital data acquisition function, IT8700P can directly obtain the Vpk+ and Vpk- values without an oscilloscope.
