A NON-ISOLATED DRIVER FOR LED LIGHTING

A non-isolated LED driver has a converter which delivers first and second outputs. A sense circuit is coupled to both the first output and the second output, between the converter and an LED unit. The currents at the first output and the second output are compared to obtain a difference therebetween...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHENG, Zhenyi, LI, Kang, SHI, Liang, WANG, Gang, CAI, Bo, ZHOU, Lei, LUO, Guangyi
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A non-isolated LED driver has a converter which delivers first and second outputs. A sense circuit is coupled to both the first output and the second output, between the converter and an LED unit. The currents at the first output and the second output are compared to obtain a difference therebetween, and a leakage fault is determined based on an alternating current component of the difference. This avoids the need for an isolated driver, by instead detecting a leakage fault and then taking appropriate safety actions.