| Paper Abstract and Keywords |
| Presentation |
2020-08-06 13:00
A control circuit design of power converter with time-division input impedance modulation for energy transducer with high output impedance
Kazuma Koketsu, Toru Tanzawa (Shizuoka Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
This paper proposes a practical control circuit design of power converter for energy transducer with high output impedance. In conventional control circuit systems, the input voltage of the power converter is set so that the output power becomes maximum. In reality, this operating point voltage can be lower than the lower limit of the supply voltage at whicih the power converter can work. A proposed control circuit enables the power converter to operate when the output voltage is lower than V_PP and the input voltage is higher than a specified voltage V_DD. As a result, the input impedance Z_CPin of the power converter can be low enough to extract power from the energy transducer via a power supply capacitor C_DD when the power converter is enabled. The power is input from the power supply capacitor C_DD to the converter with low impedance. On the other hand, Z_CPin can be high enough to charge up C_DD via the energy transducer when the power converter is disabled. As a result, 1) the operating point of the input voltage can be controlled to be higher than the minimum supply voltage, 2) a maximum power can be extracted, and 3) the output voltage is controlled to be the target voltage. The proposed circuit system was fabricated in 65nm 1V CMOS and its operation was verified. As a result, the proposed integrated circuit converts an output power of 50µW at an output voltage of 2.5V from a thermoelectric energy transducer with an open circuit voltage of 0.9V and output impedance of 400Ω. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
IoT / Energy harvesting / Thermoelectric generator / DC/DC / Charge pump / / / |
| Reference Info. |
ITE Tech. Rep. |
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| Download PDF |
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| Conference Information |
| Committee |
IEICE-ICD IEICE-SDM IST |
| Conference Date |
2020-08-06 - 2020-08-07 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Online |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Analog, Mixed Analog and Digital, RF, and Sensor Interface, Low Voltage/Low Power Techniques, Novel Devices/Circuits, and the Applications |
| Paper Information |
| Registration To |
IEICE-ICD |
| Conference Code |
2020-08-ICD-SDM-IST |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
A control circuit design of power converter with time-division input impedance modulation for energy transducer with high output impedance |
| Sub Title (in English) |
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| Keyword(1) |
IoT |
| Keyword(2) |
Energy harvesting |
| Keyword(3) |
Thermoelectric generator |
| Keyword(4) |
DC/DC |
| Keyword(5) |
Charge pump |
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| 1st Author's Name |
Kazuma Koketsu |
| 1st Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 2nd Author's Name |
Toru Tanzawa |
| 2nd Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2020-08-06 13:00:00 |
| Presentation Time |
25 minutes |
| Registration for |
IEICE-ICD |
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| Volume (vol) |
vol.44 |
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