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In mobile platforms, the 3-level buck converters are newly adopted in IF PMICs to support the fast charging mode. Despite the new adoption, we cannot avoid the ringing noises at the switch transitions which cause significant RFI issues in mobiles. In this paper, we propose a new modeling methodology for the SMPS ringing noises at the 3-level buck converter-based fast charging mode. The method can...
In mobile platforms, RFI problems caused by the noises on switched-mode power supplies (SMPSs) have arisen. The SMPS noise which affects RF bands is generated by the voltage ringing at the switch transitions in the SMPS operation. This voltage ringing is caused by the parallel resonance between the chip-level capacitance and the PCB routing inductance in the off-chip level. In this paper, we propose...
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