A DC-DC Boost Converter with Adaptive On-Time Control and Zero-Current Switching for Energy Harvesting System
碩士 === 國立臺灣科技大學 === 電子工程系 === 105 === Sensors play a dominate role in environmental monitoring, disaster prevetion, home care … and so forth to realize the so-called intelligent living for modern humankinds. How to power such immense sensors becomes an everlasting hot topic for related research. In...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2017
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| Online Access: | http://ndltd.ncl.edu.tw/handle/54342875643148006935 |
| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 105 === Sensors play a dominate role in environmental monitoring, disaster prevetion, home care … and so forth to realize the so-called intelligent living for modern humankinds. How to power such immense sensors becomes an everlasting hot topic for related research.
In this thesis, a boost converter for on-chip solar cell is proposed to power the succeeding temperature sensor. The adaptive on-time control is adopted to increase the power conversion efficiency under extreme light load and narrow the switching frequency range under input voltage variation. The zero-current switching is also applied to reduce the power loss caused by reverse recovery current to further enhance the overall conversion efficiency.
The chip is realized in a TSMC 0.18-μm standard CMOS process with 1.053×0.603 mm2 chip area (including I/O pads). The operational input voltage range is 0.8V~1.2V and the output voltage is stabilized at 1.8V. With post-simulations, the output ripple is around 2% under an extremely wide load current range of 30μA~30mA. The peak power conversion efficiency is 86.45% at 5mA load current.
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