(1) The output voltage or power of the output of the dr […]
(1) The output voltage or power of the output of the driver exceeds the working range of the electronic load meter. (especially in CV mode, the maximum test power should not exceed 70% of the maximum load power, otherwise the load may be over-power protected during loading, causing the drive to not work or load.)
(2) The characteristics of the electronic load meter used are not suitable for measuring the constant current source. The load voltage position jump occurs, causing the drive to not work or load.
(3) Because the input of the electronic load meter will have a large internal capacitance, the test is equivalent to connecting a large capacitor in parallel with the output of the driver, which may cause unstable current sampling of the driver.
Because the LED driver is designed to meet the operating characteristics of LED luminaires, the closest test to actual and real-world applications should be to use LED bead as the load, string on the ammeter and voltmeter to test.