The DC-DC converter used in the power circuit of the mobile phone may cause the instability of the power supply circuit and cause bad influence to the circuit by using the leakage of the magnetic flux of the power inductor. These problems can be solved by using less stacked power inductors with magnetic beam leakage, which can prevent noise interference and stabilize the power circuit. In addition, the magnetic beam leakage is low, and the electromagnetic coupling between the power circuit and the surrounding signal line can be reduced, and the signal purity degradation caused by noise is suppressed.
Magnetic flux leakage monitoring data for power inductors and stacked power inductors. And as has been winding power inductor main power inductor using DC-DC converter. Compared with the magnetic beam laminated type power inductor less leakage, it has been confirmed that the structure of closed magnetic flux leakage less. These data show that, in the small high-speed switching DC-DC converter circuit, the use of small stacked power inductors, can play its anti noise characteristics of expertise.
The small and thin demand for portable devices will make it necessary to have smaller components on board. The miniaturization and thinness of the DC-DC converter in the power circuit can make the switching frequency higher and the surrounding components more compact.
The relationship between the power conversion efficiency and power inductance performance of the DC-DC converter. PFM refers to the mode of low current load in the standby mode, when the power conversion efficiency is related to the power inductance Rac (AC resistance) and the current sense of the paranoid characteristics. The Rac characteristic of each power inductor and the number of switching frequency are the power conversion efficiency characteristics of the DC-DC converter IC of 4MHz.
Showing the Rac characteristics, the LQM family is capable of fully inhibiting Rac. At the same time, the current sensing characteristic shows that it can ensure high sensitivity when current is energized, and has good power conversion efficiency characteristics. These capabilities enable mobile phones to achieve high power conversion efficiency in standby mode and contribute to extended battery life. The function of more power SMD inductors is under development, so please pay attention to it.