TY - GEN
T1 - Linear AC LED driver with the multi-level structure and variable current regulator
AU - Noge, Yuichi
PY - 2015/7/27
Y1 - 2015/7/27
N2 - This paper proposes a linear AC LED driver for LED lighting applications. The proposed circuit is small in size because the circuit structure consists of only semiconductors and resistors without any reactors and electrolytic capacitors. The current bypass circuit which is connected in parallel to the LED string consists of single MOSFET, single zener diode and two resistors. The MOSFET is operated in an active state by a self-bias circuit. Thus, an external controller and high voltage gate drivers are not required. The proposed circuit is experimentally validated by using a 7 W prototype. From the experimental results, the THD of input current is 2.1% and the power factor is 0.999. In addition, the simulation loss analysis demonstrates an efficiency of 87% for a 7 W prototype.
AB - This paper proposes a linear AC LED driver for LED lighting applications. The proposed circuit is small in size because the circuit structure consists of only semiconductors and resistors without any reactors and electrolytic capacitors. The current bypass circuit which is connected in parallel to the LED string consists of single MOSFET, single zener diode and two resistors. The MOSFET is operated in an active state by a self-bias circuit. Thus, an external controller and high voltage gate drivers are not required. The proposed circuit is experimentally validated by using a 7 W prototype. From the experimental results, the THD of input current is 2.1% and the power factor is 0.999. In addition, the simulation loss analysis demonstrates an efficiency of 87% for a 7 W prototype.
UR - http://www.scopus.com/inward/record.url?scp=84961926969&partnerID=8YFLogxK
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U2 - 10.1109/ICPE.2015.7167898
DO - 10.1109/ICPE.2015.7167898
M3 - Conference contribution
AN - SCOPUS:84961926969
T3 - 9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia
SP - 964
EP - 969
BT - 9th International Conference on Power Electronics - ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia
Y2 - 1 June 2015 through 5 June 2015
ER -