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A SIMPLE AC-DC CONVERTER WITH INDIRECT FEEDBACK

Jyothi Joseph and Ajithanjaya Kumar M K
Department of Electrical and Electronics, St. Joseph Engineering College, Vamanjoor, Mangalore, India.

Abstract—A simple low power low voltage AC-DC converter with indirect feedback is presented in this paper. Low power driver circuits can be benefited; since it converts low AC voltage (millivoltage range) to high DC voltage (3.3 volt DC). Direct AC to DC conversion reduces the complexity of the system. The control and driver circuits play a key role in proposed system as the whole system is low voltage/power based. The lack of common ground has implementation difficulty both in feedback and control. Indirect feedback is used to avoid such conditions. The system is more efficient and compact. The feedback section is very simple and thus easy to implement, which also consume low power. An auxiliary supply is also designed to provide power to the gate drivers. For varying load the indirect feedback can be utilized. The design and selection of critical components are discussed. Using MATLAB/Simulink the proposed AC-DC converter is simulated and outputs are obtained.

Index Terms—AC-DC converter, Indirect feedback, MOSFET, Auxiliary supply, MATLAB/Simulink, Low power, Low voltage

Cite: Jyothi Joseph and Ajithanjaya Kumar M K1, "A SIMPLE AC-DC CONVERTER WITH INDIRECT FEEDBACK," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 1, No. 1, pp. 209-213, March 2015.