Abstract
LED(Light Emitting Diode) lighting with a long life span and high efficiency is a light source used in various fields. In order to drive these LED modules, a PFC converter and a DC-DC converter capable of controlling the current constant are required. Conventional single output LED converters can achieve high efficiency and high power density, but there is a problem that high capacity and low utilization make maintenance difficult. In order to output a plurality of LED lighting, constant current characteristics are maintained for each output, and an independent converter of an LED protection circuit is required for each channel. Also, Multi-output LED converters have a problem that other LED lighting does not operate normally when one of the output LED lighting fails. Therefore, in this paper, it is suggested that multiple LED lighting can be driven without problems by applying 4 coupled inductor to one LLC resonance converter, and that other LED lighting can operate normally even if the output LED lighting fails.
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