A Buck Converter for 5G NR RF-PA with 400ns Rise- and Fall-time and Spread Spectrum Switching

2021 ◽  
Author(s):  
Jiawen Hu ◽  
Yu Zhou
Keyword(s):  
Spread Spectrum ◽  
Buck Converter ◽  
Fall Time

scholarly journals A Low EMI DC-DC Buck Converter with a Triangular Spread-Spectrum Mechanism

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 856
Author(s):  
Jing-Yuan Lin ◽  
Yi-Chieh Hsu ◽  
Yo-Da Lin
Keyword(s):  
Spread Spectrum ◽  
Electromagnetic Interference ◽  
Output Voltage ◽  
Buck Converter ◽  
Circuit Board ◽  
System Stability ◽  
Maximum Efficiency ◽  
Load Current ◽  
Voltage Range ◽  
Switching Regulators

In this paper, a triangular spread-spectrum mechanism is proposed to suppress the electromagnetic interference (EMI) of a DC-DC buck converter. The proposed triangular spread-spectrum mechanism, which is implemented in the chip, can avoid modifying the printed circuit board of switching regulators. In addition, a lower ripple of output voltage of switching regulators and a better system stability can be realized by the inductive DC resistance (DCR) current sensing circuit. The chip is fabricated by using TSMC 0.18-μm 1P6M CMOS technology. The chip area including PADs is 1.2 × 1.15 mm2. The input voltage range is 2.7~3.3 V and the output voltage is 1.8 V. The maximum load current is 700 mA. The off-chip inductor and capacitor are 3.3 μH and 10 μF, respectively. The experimental results demonstrate that the maximum spur of the proposed DC-DC buck converter with the triangular spread-spectrum mechanism improves to 14dBm. Moreover, the transient recovery time of step-up and step-down loads are both 5 μs. The measured maximum efficiency is 94% when the load current is 200 mA.

Impact of the Spread-Spectrum Technique on the Higher-Order Harmonics and Radiated Emissions of a Synchronous Buck Converter

2018 ◽  
Author(s):  
Raul Blecic ◽  
Josip Bacmaga ◽  
Adrijan Baric ◽  
Fabio Pareschi ◽  
Riccardo Rovatti ◽  
...  
Keyword(s):  
Spread Spectrum ◽  
Higher Order ◽  
Buck Converter ◽  
Radiated Emissions

scholarly journals Effects of Spread Spectrum on Output Filter of Buck Converter

2013 ◽  
Vol 19 (5) ◽  
Author(s):  
J. Jankovskis ◽  
D. Stepins ◽  
N. Ponomarenko
Keyword(s):  
Spread Spectrum ◽  
Buck Converter ◽  
Output Filter

scholarly journals The Effect of EMI Generated from Spread-Spectrum-Modulated SiC-Based Buck Converter on the G3-PLC Channel

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1416
Author(s):  
Waseem El Sayed ◽  
Piotr Lezynski ◽  
Robert Smolenski ◽  
Niek Moonen ◽  
Paolo Crovetti ◽  
...  
Keyword(s):  
Channel Capacity ◽  
Error Rate ◽  
Spread Spectrum ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Power Converters ◽  
Transmission Error ◽  
Buck Converter ◽  
Capacity Degradation ◽  
Capacity Reduction

Power line communication (PLC) is increasingly emerging as an important communication technology for the smart-grid environment. As PLC systems use the existing infrastructure, they are always exposed to conducted electromagnetic interference (EMI) from switching mode power converters, which need to be tightly controlled to meet EMC regulations and to ensure the proper operation of the PLC system. For this purpose, spread-spectrum modulation (SSM) techniques are widely adopted to decrease the amplitude of the generated EMI from the power converters so as to comply with EMC regulations. In this paper, the influence of a spread-spectrum-modulated SiC-based buck converter on the G3-PLC channel performance is described in terms of channel capacity reduction using the Shannon–Hartley equation. The experimental setup was implemented to emulate a specific coupling path between the power and communication circuits and the channel capacity reduction was evaluated by the Shannon–Hartley equation in several operating scenarios and compared with the measured frame error rate. Based on the obtained results, SSM provides the EMI spectral peak amplitude reduction required to pass the electromagnetic compatibility (EMC) tests, but results in increased EMI-induced channel capacity degradation and increased transmission error rate in PLC systems.

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