AOZ8535DI

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EMI/RFI filters are common in modern electronic circuits, they are used to reduce or even reject interference signals from entering or leaving the system. These components are also known as noise filters, they can be designed with passive components such as capacitors, inductors, resistors, transformers, or even active semiconductor components. Among the various types of these EMI/RFI filters, LC and RC filters are most widely used and most cost-effective solutions. AOZ8535DI, as one of the EMI/RFI filters, is a switch-mode common-mode filter which integrated two low-pass filter (LPF) to filter both differential-mode signal and common mode signals.

The AOZ8535DI EMI/RFI filter is mainly aimed at two applications: software radio and switch mode power supplies. In terms of software radio, the AOZ8535DI filter provides a single stage filter with excellent common mode power supply rejection, thereby reducing the overall design complexity. The filter also helps improve the shielding performance of the radio, therefore increasing the interference immunity of the radio to external disturbance. When applied to switch mode power supplies, the EMI/RFI filter can ensure stable and clean power supply to sensitive electronic equipment and help reduce the generation of EMI/RFI.

AOZ8535DI EMI/RFI filter works by combining two low-pass filters (LPF). The first LPF is a series filter which applies to differential mode signals while the second LPF is a shunt filter which is connected in parallel and used to filter common mode signals. The filter also has an integrated switch that helps switch between low-dropout (LDO) and shunt regulator to provide optimal performance in different working conditions. Thetwo low-pass filter reduce the differences between the differential-mode signal and the common mode signal, and also keep the common mode signal within the desired band\'s of frequencies. In addition, the AOZ8535DI filter also provides an input resistor with higher resistance than a traditional LC network filter, thereby making the filter resistant to power supply interference.

The AOZ8535DI EMI/RFI filter is an ideal choice for application that require both common mode and differential mode signal filtering. The filter offers superior high frequency noise reduction in soft radio radio applications and achieves EMI/RFI reduction in power supplies. Its integrated switch mode would simplify the design of the overall system while providing good interference immunity. In addition, its integrated switch allows for lower power consumption in comparison to a traditional RC network filter.

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