How to carry out LED driver power test?
In order to further improve the performance of LED driver power supply and ensure the excellent quality of manufactured products, LED driver power supply manufacturers usually need to undergo a rigorous testing process, including input test, output test, protection test, safety test, environmental test and EMC. Test a wide variety of test items. Here is a brief introduction to the following key test items for LED driver power:
1, energy efficiency
High-efficiency LEDs are energy-efficient products that drive power supplies with high efficiency. For lamps with such a structure in which the drive power is installed, power efficiency is even more important. Since the luminous efficiency of the LED decreases as the temperature of the LED increases, the heat dissipation of the LED is very important. The driving power supply has high efficiency, its power consumption is small, and the heat generated in the lamp is small, which reduces the temperature rise of the lamp.
2, power factor
The power factor is the load on the grid. As the requirements for power quality continue to increase, the quality of power and harmonics caused by electrical equipment are receiving increasing attention. The "Technical Specification for Energy-Saving Certification of AC Electronic Control Devices for LED Modules" specifies the energy-efficiency limit value of the LED control device, and the line power factor is at least 0.7.
3, the output ripple
Ripple is the AC voltage applied to the DC output voltage and is an important measurement parameter in the LED power supply test. The higher the ripple current, the more it affects LED performance and even the LED's lifetime.
4, input surge current
The LED driver must have the ability to suppress inrush current to protect the LED from damage. The input surge current is generally the maximum inrush current when the AC voltage is at the peak (90° or 270°) during cold start. Important components of LED power supplies, such as input fuses, rectifiers, etc., are typically rated higher than the input surge current value.
5, input power abnormal test
The main purpose of the input power supply abnormal simulation of the LED driver power supply is to evaluate whether the LED driver power supply can meet the requirements of the electromagnetic compatibility test for the voltage immunity test part. This part can refer to IEC 61000-4-11: voltage sag, short Interruption and voltage variations are specified in the immunity test.
In order to accurately evaluate the LED drive power performance indicators, verify that each test item meets the technical requirements, you need to choose the appropriate LED drive power test program.