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This paper proposes an adaptive feedback gain compensation technique and adaptive feedforward loop control based on analog design for an asymmetrical half-bridge converter without electrolytic capacitor to improve the system dynamic response and the system performance (i.e., low flickering and low ripple) for dimmable high-brightness light-emitting diode (LED) applications. In addition, an improved...
This paper presents an asymmetrical half bridge (AHB) converter for dimming low-voltage high-current LED lighting application. An improved driving circuit of a self-driven (SD) synchronous rectification (SR) is proposed for switching loss reduction at the secondary of the transformer. The control circuit is designed such that the SR MOSFET switch operates under zero-voltage switching (ZVS) mode while...
This paper proposes an adaptive feedback gain compensation technique and simple PI control for an asymmetrical half-bridge (AHB) converter to solve slow system response problem due to the fact that the DC gain of the AHB converter depends on the duty cycle. The focus is on dimmable high brightness light-emitting diode (LED) applications subjected to disturbances or an immediate change of the reference...
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