Provided is a converter for an HEV system. The converter includes a PCB, a PWM (IC) mounted on the PCB to output a plurality of PWM signals including a first PWM signal and a second PWM signal, a plurality of MOSFETs mounted on the PCB, the plurality of MOSFETs including a first MOSFET, which performs a switching operation according to the first PWM signal, and a second MOSFET which performs a switching operation according to the second PWM signal, and a plurality of inductors including a first inductor, which is magnetized according to the switching operation of the first MOSFET to operate in one phase, and a second inductor which is magnetized according to the switching operation of the second MOSFET to operate in other one phase.