Browsing by Author "Chu, Fang-Chih"

Now showing 1 - 3 of 3

A 99.2% Tracking Accuracy Single-Inductor Quadruple-Input-Quadruple-Output Buck-Boost Converter Topology with Periodical Interval Perturbation and Observation MPPT
(2018-01-01)
Huang, Chao-Jen
;
Ma, Yao-Sheng
;
Yang, Wen-Hau
;
Lin, Yen-Ting
;
Kuo, Chun-Chieh
this paper provides a Single-Inductor Quadruple-Input--Quadruple-Output buck-boost converter to achieve maximum tracking efficiency of 99,2% due to continuous supply in one cycle. The Maximum Power Point (MPP) tracking mode and the Harvest Energy Delivering (RED) mode harvest each energy harvesting source, deliver energy to the battery and supply it to the loading system in one cycle. Each output voltage ranges from 600mV to 2.5V and the maximum output power is up to 60mW. The peak efficiency is 91.2%.
Batteryless 275mV Startup Single-Cell Photovoltaic Energy Harvesting System for Alleviating Shading Effect
(2013-01-01)
Huang, Chao-Jen
;
Su, Yi-Ping
;
Chen, Ke-Horng
;
Huang, Li-Ren
;
Chu, Fang-Chih
without any batteries, a low input voltage converter is presented for a single-cell (SC) photovoltaic (PV) energy harvesting to alleviate the energy degradation due to shading effect. The proposed low voltage startup (LVS) circuit with low input voltage of 275 mV and less than 840 ms startup time achieves high voltage conversion ratio to supply a high accuracy bandgap reference. Experimental results show the maximum power throughput is up to 6 mW and the quiescent power is less than 650 mu W with integrated two buck-boost converters and two boost converters. The peak efficiency of the boost converter can be up to 75.8% for ultra-low voltage hearing aid systems.
Batteryless 275mV Startup Single-Cell Photovoltaic Energy Harvesting System for Alleviating Shading Effect
(2013-01-01)
Huang, Chao-Jen
;
Su, Yi-Ping
;
Chen, Ke-Horng
;
Huang, Li-Ren
;
Chu, Fang-Chih
without any batteries, a low input voltage converter is presented for a single-cell (SC) photovoltaic (PV) energy harvesting to alleviate the energy degradation due to shading effect. The proposed low voltage startup (LVS) circuit with low input voltage of 275 mV and less than 840 ms startup time achieves high voltage conversion ratio to supply a high accuracy bandgap reference. Experimental results show the maximum power throughput is up to 6 mW and the quiescent power is less than 650 mu W with integrated two buck-boost converters and two boost converters. The peak efficiency of the boost converter can be up to 75.8% for ultra-low voltage hearing aid systems.