Power supply protection test
1. Overvoltage protection (OVP) test
When the output voltage of the power supply exceeds its maximum limit voltage, the power supply will shut down its output (SHUTDOWN), which is called overvoltage protection.
The overvoltage protection test is used to verify whether the power supply can respond correctly when the above abnormal situations occur. The overvoltage protection function is particularly important for some voltage sensitive loads, such as CPUs, memory, logic circuits, etc., because if these valuable components exceed their rated values due to high operating voltage, it can cause destructive damage and result in heavy losses.
2. Overcurrent protection (OCP) test
When the output current of the power supply exceeds the rated value, the power supply should limit its output current or turn off its output to avoid damage caused by excessive load current. If the internal components of the power supply are damaged and cause a load current greater than normal, the power supply should also shut down its output to avoid damage.
The overcurrent protection test is to verify whether the power supply can respond correctly when any of the above situations occur. Output overcurrent situation. During testing, the load current can be pre-set. The load current value starts to rise until the output voltage of the power supply is lower than the set critical voltage value.
3. Short circuit protection test
When the output of the power supply is short circuited, the power supply should limit its output current or turn off its output to avoid damage. Short circuit protection testing is to verify whether the power supply can respond correctly when the output is short circuited.
