Electronic load is a kind of device that consumes electric energy by controlling internal power (MOSFET) or transistors’ flux (duty cycle). It can accurately detect the load voltage, accurately adjust the load current, and simulate the load short circuit. The simulated load is resistive and capacitive, and the capacitive load current rise time. The debugging and testing of general switching power supply is indispensable.
The electronic load can simulate the load in the real environment. It has the functions of constant current, constant resistance, constant voltage and constant power. Electronic load is divided into DC electronic load and AC electronic load. Due to the application of electronic load, this paper mainly introduces DC electronic load.
Electronic load is generally divided into single electronic load and multi-body electronic load. This division is based on the user’s needs, and the object to be tested is single or needs multiple simultaneous tests.
Electronic load should have perfect protection function.
The protection function is divided into internal (electronic load) protection function and external (equipment under test) protection function.
The internal protection includes: over voltage protection, over current protection, over power protection, voltage reverse protection and over temperature protection.
External protection includes: over current protection, over power protection, load voltage and low voltage protection.
Post time: May-10-2021