Half-Bridge Single-Input Multi-Output DC-DC Converter with Dimming Capability for Lighting Applications

• Published in: Russian electrical engineering Vol. 93; no. 5; pp. 341 - 349
• Main Authors: Behnam Abbasi Soltani, Ardashir, Jaber Fallah, Sabahi, Mehran, Babaei, Ebrahim, Pouladi, Jaber
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2022; Springer Nature B.V
• Subjects: Circuit design; Conduction losses; Dimming; Electric bridges; Engineering; Light emitting diodes; Machines; Manufacturing; Processes; Short circuits; Switches; Switching; Voltage converters (DC to DC); multi-output converter; DC-DC converter; light-emitting-diode; dimmable
• ISSN: 1068-3712; 1934-8010
• DOI: 10.3103/S106837122205011X

In this paper, a half bridge single-input multi-output (SIMO) DC-DC converter, to supply light emitting diode (LED), is proposed. The proposed DC-DC converter provides the ability to individually control the brightness of each output channel. In order to control the output power of each channel, a burst control mode is employed resulting in reduction of conduction losses and improving efficiency. Moreover, the half bridge switches are turned on/off at zero voltage with a fixed switching frequency; therefore, the switching losses is reduced and efficiency is further increased. In addition, due to the fixed switching frequency, the converter will not have the problems of variable frequency. The proposed converter works safely in both short-circuit cases and open-circuit conditions thanks to series resonant circuit specifications. Design and implementation have been simplified by choosing the same structure for outputs. A two-channel laboratory prototype is built and tested to verify the theoretical analyses.