Contents
How does electronic load work?
In an actual electronic load, VREF is supplied by a digital-to-analog converter (DAC). The user sets the DAC output voltage to yield the desired constant-curent level. The CC accuracy specification is largely determined by the accuracy of the digital-to-analog converter used in this circuit.
What is constant resistance mode?
In Constant Resistance (CR) mode, the electronic load will act like a fixed resistor. It senses the voltage at its input and sinks a current linearly proportional to the input voltage. Constant resistance mode is also most often used to measure the start-up conditions of electronic devices.
What is constant load?
Constant power loads (CPL) means that the output power of the convertor is constant, i.e., the output voltage drops when small variations occur in the current value (increasing current amount), which means that when neglecting the dissipated power into the circuit, the output power and input power are equal [22,36].
What is constant impedance load?
A constant impedance load is simply a load that presents an unchanging impedance, like a resistor. Since this has to maintain it’s power into it’s load, it must draw the same power from it’s source even if the source changes voltage.
What is a electronic load used for?
An electronic load tests power sources by emulating a device under test (DUT). Device manufacturers and design engineers use electronic loads to test power devices such as power supplies, DC-DC converters, chargers, adapters, batteries, solar panels, fuel-cells, and more.
What is programmable electronic load?
An electronic load is a type of instrument that applies a voltage and sinks current. Also known as a programmable load, this tool emulates AC or DC electronic loads to perform thorough functional tests on batteries, solar cells, wind generators, and other common power sources.
What is a DC electronic load?
An electronic load is a type of instrument that applies a voltage and sinks current. Also known as a DC programmable load, these AC or DC electronic loads are used by power supply, battery, solar, wind, or other manufacturers who want to thoroughly test their power sources.
What is DC load?
On the other hand, DC stands for Direct Current. It is the current that is generated by energy generators such as solar panels and batteries. Loads that require DC Power are called DC loads. Some common examples are laptop batteries; cell phone batteries and DC powered LED lights.
How does a constant resistance load mode work?
In Constant Resistance (CR) mode, the electronic load will act like a fixed resistor. It senses the voltage at its input and sinks a current linearly proportional to the input voltage. You might use the constant resistance mode to test the capacity of batteries.
What is the input resistance of an electronic load?
With current sensing at 1 V/A and voltage sensing at 0.2 V/V, the electronic load’s resulting input resistance value is 5 ohms for its CR mode operation in Figure 5. An electronic load’s CR mode is well suited for loading a power source that is either a voltage or current source by nature.
When to use constant current or constant current mode?
You might use the constant current mode to ensure that your power supply can output the maximum specified current under all conditions. In Constant Resistance (CR) mode, the electronic load will act like a fixed resistor. It senses the voltage at its input and sinks a current linearly proportional to the input voltage.
Which is the most frequent mode of electronic load?
Constant current (CC) is the most frequent mode in which an electronic load is used. In constant current mode, the load will sink the programmed current independently from the output voltage which is typically forced by the voltage source connected to it (for example a battery). How and where to use CC mode