Modelling of 200W LED Driver circuit design with LLC converter
Author(s):
Boyapati Chandrasekhar , MIT,Manipal; Anjan Padmashali, MIT,ManipalKeywords:
LED(Light Emitting Diode), Constant current(CC), Pulse width modulation(PWM), Continuous conduction mode(CCM), Discontinuous conduction mode(DCM), Series Resonant Converter (SRC), Parallel Resonant Converter(PRC), Zero voltage switching(ZVS), Electromagnetic interface(EMI), Gain Margin(GM), Phase Margin(PM),Voltage gain(M), Coupling factor(K), Primary side turns (Np), Secondary side turns (Ns)Abstract:
LED is a recent technology, which has replaced all other conventional light sources in the past few years and since it is current controlled, accurate driver design is necessary. The LED driver should have the capability of providing constant current regardless of the LED forward voltage variations. The LLC converter is controlled to operate as a constant current mode LED driver. A 100 kHz, 200W LLC LED driver is designed and calculated to verify the proposed circuit and design method. This paper proposes mathematical model of 200W LED driver circuit design with LLC resonant converter. The proposed circuit uses a full bridge rectifier to convert AC to DC and increases the rectified output voltage using boost converter which is operated in continuous conduction mode and a quasi-half bridge resonant converter to drive the LED lamp load with coupling transformer. The LLC converter is designed such that solid state switches of quasi half bridge are working under zero switching scheme to reduce switching losses. The analysis, design and modelling of 200 W LED driver is carried out by mathematical model and stability analysis for universal AC mains.
Other Details:
| Manuscript Id | : | J4RV2I2002 |
| Published in | : | Volume : 2, Issue : 2 |
| Publication Date | : | 01/05/2016 |
| Page(s) | : | 1-7 |
