THE STUDY AND EVALUATION OF OUTPUT PARAMETERS IN SRBC

In era of technology, rapid advancement of low-loss converter design has
become a major challenge to designers. Synchronous Rectifier Buck Converter
(SRBC) is one of them. It is perceived that the development of low power
converters in future must have the capability to operate in megahertz switching
frequency. In this work, the study and evaluation of parameters in SRBC for two
conditions: Continuous Conduction Mode (CCM) and Discontinuous Conduction
Mode (DCM) will be carried out. This will help in search of the optimized
parameter values for both conditions. This project will be based on simulation
circuit using PSPICE software. The simulation will involve the study of the data
sheet, circuit operation and the fundamental of SRBC circuit. Then, the results
will be evaluated in terms of its losses, ripple and also body diode conduction. At
the end of the project, the comparison between Conventional SRBC with
Adaptive Gate Drive (AGD), Compensator and AGD, MOSFET Parallelism and
Maximum Power Point Tracking (MPPT) are done to analyze on the performance
of the circuit. It is found that the optimized parameter values for CCM are £=15
11H, C=0.625 11F and R=3.5 n while for DCM the value are L=l 11H, C=9.375 f.IF
and R=4 n. Comparatively, it is proven that the Conventional SRBC is best
when implementing using MPPT controller due to its ability in improving the
output voltage and current and also reducing the losses which are voltage ripple,
current ripple and body diode conduction.