Loading...

An ultra-low-noise buck converter for noise-sensitive applications

Besharati Rad, A ; Sharif University of Technology | 2024

19 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/TPEL.2023.3335335
  3. Publisher: IEEE , 2024
  4. Abstract:
  5. An ultra-low-noise buck converter for noise-sensitive applications is presented, which utilizes a novel pseudo average current-mode control (ACMC) with an adaptive ramp generator to decrease the baseband noise. Also, in order to suppress electromagnetic interference (EMI) and high-frequency spurs, spread spectrum and secondary filter are used, respectively. The proposed ACMC buck converter suppresses the switching frequency perturbation effect on the output voltage, and as a result in the spread spectrum condition, only a small amount of noise is added to the output voltage in the baseband frequency. For the spread spectrum with an external clock, a phase-locked loop is used, which synchronizes the internal oscillator and adapts the ramp generator slope to suppress spread spectrum baseband noise. The proposed ACMC converter achieves only 58 μ Vrms noise in 100 Hz-100 kHz frequency range. Also, a pm10% random spread spectrum architecture suppresses the EMI level by 11 dB while achieving only 88 μ Vrms and 156 μ Vrms noise for internal and external clock synchronization, respectively. The peak efficiency of the converter is 95% and the output voltage disturbance is 100 mV at a 2-A load step with 16 μs settling time. The proposed design is implemented on a 180-nm BCD technology occupying a 1.65×3.70 mm2 die size. © 1986-2012 IEEE
  6. Keywords:
  7. DC-DC converter ; External clock synchronization of dc-dc converters ; Pseudo average current-mode control (ACMC) ; Ultra-low-noise buck ; Buck converter ; Electric clocks ; Electric inverters ; Electromagnetic pulse ; Electromagnetic wave interference
  8. Source: IEEE Transactions on Power Electronics ; Volume 39, Issue 2 , 2024 , Pages 2169-2179 ; 08858993 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/10324319