Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/144268
Title: A SUB-10 MV POWER CONVERTER WITH FULLY INTEGRATED SELF-START, MPPT AND ZCS CONTROL FOR THERMOELECTRIC ENERGY HARVESTING
Authors: LUO ZHIHONG
Keywords: IoT, TEG, PMIC, CCM, ZCS, MPPT
Issue Date: 15-Dec-2017
Citation: LUO ZHIHONG (2017-12-15). A SUB-10 MV POWER CONVERTER WITH FULLY INTEGRATED SELF-START, MPPT AND ZCS CONTROL FOR THERMOELECTRIC ENERGY HARVESTING. ScholarBank@NUS Repository.
Abstract: An inductive power converter for thermoelectric generator (TEG) is presented in this thesis. A novel redundant inverter ring oscillator is proposed to self-oscillate under a very low supply voltage down to 45 mV. An additional self-start assist circuit with differential clock booster and exponential charge pump (CP) is implemented in the power converter to achieve lower self-start voltage. Boundary continuous-conduction mode (CCM), zero current switch (ZCS) and maximum power point tracking (MPPT) features have been incorporated into the power converter. Selective turn-on dynamic comparators have been used in ZCS and MPPT circuits to save power and achieve minimum operating supply voltage. Fabricated in 65-nm CMOS process, the chip can self-start at 210 mV. After self-start, only 7-mV input voltage is needed to sustain the power converter operation. With a TEG open-circuit voltage of 80 mV and internal resistance of 5 Ω, the chip can provide a maximum output power of 229 µW with end-to-end efficiency of 71.5%.
URI: http://scholarbank.nus.edu.sg/handle/10635/144268
Appears in Collections:Ph.D Theses (Open)

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