TH8305-600-30 Rackmount Programmable DC Electronic Load Module

TH8300/TH8310 series programmable DC electronic load adopts modular design, users can select different parameters according to their own needs for free combination of modules.

All modules can be individually set to run, can be master-slave operation, support for parallel operation between modules, the whole machine between the four on-line.

The module is equipped with dual-core (MCU+DSP) automatic control hardware circuit architecture, which makes the system run super stable. Complete circuit protection function and intelligent fan system, the instrument itself and the measured object to implement comprehensive protection. Adopt high-speed, safe and reliable 16-bit sampling chip to ensure sampling accuracy and resolution.

TH8300 series programmable DC electronic loads include the following types of modules (TH8301-80-20, TH8301A-80-20 are dual-channel modules):

Functional Features

A. Load operating mode

Conventional mode (4 types)
CC	Constant current mode	An electronic load always draws a constant current, regardless of whether the voltage changes.
CR	Constant Resistance Mode	An electronic load is equivalent to a constant resistance, and the load changes current linearly with voltage.
CV	Constant Voltage Mode	The electronic load controls the voltage output from the power supply by adjusting the pull current according to the set voltage value.
CP	Constant power mode	An electronic load is equivalent to a constant resistance, and the load changes current linearly with voltage.
Advanced modes (12)
DYN	Dynamic Load Mode	A dynamic test frequency of up to 50kHz can be used to test the dynamic characteristics of the power supply over a wide bandwidth, with two current levels that can be set, the duration of each of the two current levels, the rising slope, the falling slope, and the number of repetitions. This function can be used to test the instantaneous high current tolerance of D/D converters and batteries.
SWP	Dynamic frequency sweep mode	The electronic load provides a programmable dynamic frequency sweep to invert the frequency to find the worst case voltage of the object to be measured. Dynamic Frequency Sweep requires the setting of two current levels, start frequency, end frequency, step frequency, duration, rise slope, and fall slope. During operation, the electronic load will pull current at the set frequency for the set duration. Frequencies up to 50kHz are used to capture the worst case Vp+, Vp- and corresponding Fp+, Fp- of the power supply under test.
CR-LED	Analog LED test pattern	By setting the on-state voltage and resistance of the light-emitting diode, it can realistically simulate the actual load characteristics of the LED, avoiding the oscillations generated by the unstable voltage and current under the conventional constant resistance mode (CR), and thus detecting the real load conditions of the LED power supply.
BATT	Battery Test Mode	Load test battery performance, discharge conditions support CC, CR and CP three ways, by setting voltage, time, current capacity or power capacity of four conditions to let the electronic load to stop pulling load, to ensure that the battery will not be over-discharged and damaged.
TIME	time measurement mode	Measures the time from the start of the trigger condition to the end of the trigger condition in the range of 0s to 100000s. Can be used for battery charging and discharging tests and other similar applications.
MPPT	Maximum power point tracking test mode	Based on the DSP algorithm, find out the maximum power provided by the power supply and the corresponding voltage and current values.
OCPT	Overcurrent protection test mode	The electronic load pulls a step-up current to test whether the output voltage of the power supply is lower than the trigger voltage under overload conditions, and then determine whether the output protection function of the power supply is normal.
OVPT	Overvoltage protection test mode	The load captures the peak and falling edge of the input voltage and triggers at the preset level (Vtrig) at the time of the falling edge, then this voltage peak is the overvoltage protection point of the power supply under test, and the time interval between the peak moment and the trigger moment is the OVP response time of the power supply under test (Tovp), and the accuracy of Tovp measurement is 2us.
OPPT	Over Power Protection Test Mode	The electronic load pulls the load step-up power to test whether the output voltage of the power supply is lower than the trigger voltage under overload conditions, and then determine whether the output protection function of the power supply is normal.
SINE	Sine wave test mode	The electronic load has a unique sine wave pull current mode, which can be set to pull current deviation (I_DC), pull sine wave value (I_AC) and sine wave frequency value, the lowest point of this sine wave pull cannot be less than zero. The sine wave test can be used to simulate the ripple function.
LIST	List Test Mode	The LIST mode can accurately complete complex arbitrary current change patterns at high speeds, accomplishing precision testing of multiple quasi-positional current carry loads. Multiple complex sequences are generated by editing the pull-load value, duration, slope, and repetition times for each step to meet complex testing needs. It is mainly applied to simulate battery discharge pull current, laptop pull current, electric vehicle pull current, and dynamic current above two current levels.
AUTO	Automatic Test Mode	The AUTO mode can accurately simulate the automatic test process of the production line and complete the multi-step precision test, which can help customers to save cost greatly. Different modes can be set for each step, and by editing the pull-load value, duration, rising slope, falling slope, and the upper and lower limits of current, voltage and power for each step, you can judge whether each step is qualified or not.

B.  short circuit function

Independent short-circuit test function supports short-circuit test in any function mode, realizing seamless connection with other functions. When the instrument enters the short-circuit test, the instrument is loaded at the maximum current of the current range.

C.   ALLRUNfunctionality

With the ALLRUN function, users can realize synchronous pulling or synchronous stopping of pulling current for different modules.

D.   Module inline function

Any number of modules can be linked for master-slave operation. The type of linkage is categorized into power mode and replication mode. Power mode is where the modules involved in the link are allocated to pull a proportional amount of current based on their maximum current. Duplicate mode is when all participating modules pull the current value set by the host module.