LED Module
28/10/2013 09:05
( 8 ) MOS power switching devices and diodes to determine when the value of N , the leakage LED Bulb inductance to determine the output voltage is determined, the reflected voltage , leakage reactance caused by the anti-peak voltage can be determined , determine MOS, diodes, etc. can easily withstand voltage calculating ; specifications according to the power , to calculate the current size, it is determined MOS, it is easy to calculate the current value of the diode .
In this example : MOS input mains voltage requirement is equal to the peak voltage of + reflection + leakage inductance voltage reverse voltage , then take : 11 A, 800 V, Model : SDA11NS0C3 diode Diode check : 20 A, 200 V, Model : MBR20200CTG.
Three experimental verification
According to the above design parameters , the proposed LED drive power through a small batch and mass trials , product performance, stability and reliability. A typical test waveform shown in Figure 8, Figure 9 , THDI = 16.9%, Found PF = 0.967, thanks BCM mode current ripple appears , but has little effect on overall performance of the power supply . Products by the State Quality Inspection Center LED test, the technical indicators are better than the relevant national standards.
Among them, the power efficiency greater than 90% , reaching energy efficiency one ; power factor greater than 0.95 , in line with the Energy Star specification limit requirements ; Harmonic current compliance with national mandatory standards GB17625.1-2003/IEC61000-3-2:( 8 ) MOS power switching devices and diodes to determine when the value of N , the leakage LED Bulb inductance to determine the output voltage is determined, the reflected voltage , leakage reactance caused by the anti-peak voltage can be determined , determine MOS, diodes, etc. can easily withstand voltage calculating ; specifications according to the power , to calculate the current size, it is determined MOS, it is easy to calculate the current value of the diode .
In this example : MOS input mains voltage requirement is equal to the peak voltage of + reflection + leakage inductance voltage reverse voltage , then take : 11 A, 800 V, Model : SDA11NS0C3 diode Diode check : 20 A, 200 V, Model : MBR20200CTG.
Three experimental verification
According to the above design parameters , the proposed LED drive power through a small batch and mass trials , product performance, stability and reliability. A typical test waveform shown in Figure 8, Figure 9 , THDI = 16.9%, Found PF = 0.967, thanks BCM mode current ripple appears , but has little effect on overall performance of the power supply . Products by the State Quality Inspection Center LED test, the technical indicators are better than the relevant national standards.
Among them, the power efficiency greater than 90% , reaching energy efficiency one ; power factor greater than 0.95 , in line with the Energy Star specification limit requirements ; Harmonic current compliance with national mandatory standards GB17625.1-2003/IEC61000-3-2:
