“…The SPRC has two general types: LLC and LCC. SRC has some defects such as lack of regulation in light loads despite ZVS in switching which needs Nomenclature: V in(nom) , Nominal input voltage; V in(min) , Minimum input voltage; V out , Output voltage; P out , Output power; V f , Forward voltage of diode; V pri , Transformer primary voltage; M min , Resonant tank minimum gain; M max , Resonant tank maximum gain; M, Resonant tank maximum output gain; R ac , Efficient load resistance referred to primary side; n, Turns ratio; η, Efficiency; L r , Series inductance; L m , Parallel inductance; C r , Series capacitor; L lk1 , Primary leakage inductance; L lk2 , Secondary leakage inductance additional control system and this is not simple 19 ; however, in Lin and Nian, 20 this topology has been used for softswitching in a converter with shard lagging-leg switches and fixed switching frequency. Existence of high circulating energy in resonant tank of SRC that can be made by the high difference between the input and output voltage of converter is the other defect of SRC.…”