Adaptive driving of synchronous rectifier for LLC converter without signal sensing

Adaptive driving of synchronous rectifier for LLC converter without signal sensing

This paper presents the novel driving technique of synchronous rectifier (SR) for the LLC converter. The unique characteristic of "Vo*D=constant" of LLC converter is utilized to predict optimal duty ratio D, where D is the conduction period of secondary diode. This technique does not need...

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Hauptverfasser: Abe, S., Zaitsu, T., Yamamoto, J., Ueda, S., Sihun Yang, Shoyama, M., Ninomiya, T.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Impedance
Rectifiers
Resistance
Resonant frequency
Sensors
Switching frequency
Zero voltage switching
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Beschreibung
Zusammenfassung:This paper presents the novel driving technique of synchronous rectifier (SR) for the LLC converter. The unique characteristic of "Vo*D=constant" of LLC converter is utilized to predict optimal duty ratio D, where D is the conduction period of secondary diode. This technique does not need the sensing of SR current neither SR voltage. Additionally, the auto tuning technique is implemented to adjust the duty ratio precisely as well by digital control using TI's DSP of Piccolo TMS320F28027. The technique is confirmed by experimentally..
ISSN:1048-2334
2470-6647
DOI:10.1109/APEC.2013.6520478