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Magnetically-coupled resonant wireless power transfer (MCR-WPT) offers a novel technique to transfer power over a long distance with high efficiency. A half bridge inverter with series-resonant structure is designed as driver source for WPT system in this paper. The frequency is up to 0.9MHz, which is very higher than traditional power electronic converter. The relationship between output power, transmission...
Synchronous rectifier (SR) is widely used in flyback converter to reduce the output side conduction loss in order to meet the system conversion efficiency requirement. The conventional SR driving methods are not suitable for high frequency (>500kHz) application. This paper proposes a novel SR driving method for MHz flyback converter operating at critical conduction mode (CRM). A RC network is in...
This paper presents a two-stage multichannel light-emitting diode (LED) driver, which contains a buck converter as the first stage and a multichannel constant current CLL resonant converter as the second stage. The forward current of one LED string is sensed for feedback control to regulate the bus voltage, which is the input voltage of the CLL resonant converter. Meanwhile, the currents of other...
This paper proposes a two-stage multi-channel LED driver, which contains a buck converter as the first stage and a multi-channel constant current (MC3) CLL resonant converter as the second stage. The forward current of one specific LED string is sensed for feedback control to regulate the bus voltage, which is also the input voltage of the MC3 CLL resonant converter. In contrast, the MC3 CLL is unregulated...
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