An automatic load-adaptive switching frequency selection technique for improving the light-load efficiency of a buck converter
- Title
- An automatic load-adaptive switching frequency selection technique for improving the light-load efficiency of a buck converter
- Author
- 유창식
- Keywords
- DC-DC buck converter; Light-load condition; Power efficiency; Switching frequency selection; Load-adaptive
- Issue Date
- 2013-06
- Publisher
- Springer
- Citation
- Analog Integrated Circuits and Signal Processing, 2013, 75(3), P.349-358
- Abstract
- A load-adaptive automatic switching frequency selection scheme is proposed to improve the power efficiency of a switching buck converter at light load condition. The buck converter operates in the continuous-conduction mode for heavy loading and the switching frequency is fixed at its maximum value. For light loading, the buck converter operates in the discontinuous-conduction mode and its switching frequency is automatically selected among a pre-defined set of frequencies according to the amount of the load current. The load current can be sensed indirectly by monitoring the on-time of power transistor because it is a function of the load current. With the proposed load-adaptive automatic switching frequency selection circuit, the power efficiency of a buck converter implemented in a 0.35-mu m 2P4M BCDMOS technology is improved by 24.0-% when the load current load is 10-mA.
- URI
- https://link.springer.com/article/10.1007%2Fs10470-013-0056-4http://hdl.handle.net/20.500.11754/56980
- ISSN
- 0925-1030
- DOI
- 10.1007/s10470-013-0056-4
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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