<p>In this paper, a new decoupling magnetic integration method is proposed to address the low overall power density and high loss of the quadratic converter. These problems primarily result from its excessive magnetic components. First, the equivalent magnetic circuit model is established. Then, the circuit and magnetic circuit characteristics of the magnetic components, the flux distribution of the magnetic legs and the decoupling condition are analyzed using the permeance-capacitance analogous modeling method. Second, modal analysis is performed on the quadratic converter with a new type of integrated magnetic components. Results show that the new type of integrated magnetic components do not affect the voltage gain and current ripple of the converter itself. The magnetic components are analyzed using finite element simulation software. Simulations show that the magnetic flux distribution of the magnetic core of the new integrated magnetic components is uniform. Furthermore, the core utilization is high. Finally, through the construction of an experimental prototype, the volume and mass of the new integrated magnetic components are reduced by 51.7% and 55.6%, compared with independent magnetic components. This enhances the power density of the converter. It also reduces the loss of the magnetic components. Moreover, it improves the efficiency of the converter. This verifies the correctness and feasibility of the proposed magnetic integration method.</p>