상세정보
학술지
Delta-Sigma Modulator-Based Step-Up DC-DC Converter with Dynamic Output Voltage Scaling
- 발행일
- 202003
- 출처
- Electronics, v.9 no.3, pp.1-13
- ISSN
- 2079-9292
- 출판사
- MDPI
- 초록
- The switching noise and conversion efficiency of step-up DC-DC converters need to be improved to meet increasing demand. The delta-sigma modulation (DSM) technique is typically used to improve the performance of buck converters; however, this control scheme is not directly applicable for boost converters. This paper presents a boost DC?밆C converter using a continuous-time delta-sigma modulator (DSM) controller for battery-powered and noise-sensitive applications. The proposed converter can adjust a wide range of output voltages dynamically by clamping the maximum duty cycle of the DSM, thus enabling stable and robust transient responses of the converter. The switching harmonics in the converter output are reduced effectively by the noise shaping property of the modulator. Moreover, the converter does not suffer from instability of mode switching due to the use of a fixed third-order DSM. Fabricated in a 180 nm CMOS, the converter occupies an active area of 0.76 mm2. It produced an output voltage ranging from 2.5 V to 5.0 V at an input voltage of 2.0 V and achieved a peak conversion efficiency of 95.5%. The output voltage ripples were maintained under 25 mV for all load conditions. A low noise output spectrum with a first spurious peak located ?닋91 dBc from the signal was achieved.
- KSP 제안 키워드
- Active area, Continuous-time delta-sigma modulator, Control scheme, Conversion efficiency(C.E.), Delta-Sigma Modulation, Duty cycle(DC), Dynamic output, Input voltage, Load conditions, Low noise, Noise shaping
본 저작물은 크리에이티브 커먼즈 저작자 표시 (CC BY) 조건에 따라 이용할 수 있습니다.
