A Gate Voltage Sensing Ripple Reduction Control Technique for Switched-Capacitor DC-DC Converters

Christian Westmark Sonnichsen; Paul Stephansson

doi:10.1109/NorCAS53631.2021.9599642

A Gate Voltage Sensing Ripple Reduction Control Technique for Switched-Capacitor DC-DC Converters

Christian Westmark Sonnichsen
, Paul Stephansson

GN Hearing Danmark A/S

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

A gate voltage sensing based control technique for switched-capacitor (SC) DC-DC converters with low output voltage ripple and input peak currents is presented. The technique implements two control loops. An inner loop regulates the output voltage to virtually eliminate output voltage ripple and significantly reduce the input peak current. An outer control loop uses a control signal from the inner loop to implement switching frequency modulation to ensure high efficiency across a wide output current range. The proposed technique is implemented in a 28 nm FD-SOI CMOS process as a 2:1 series-parallel SC converter for 1.8 V input voltage, 500 mV to 850 mV output voltage and 40 µA to 6 µA output current. Across this range, the proposed technique shows an output voltage ripple reduction from 49.7mV to 3.0mV at 40µA and from 23 mV to 2.5 mV at 6 mA with no discernible effect on the power-stage efficiency.

Original language	English
Title of host publication	Proceedings of 2021 IEEE Nordic Circuits and Systems Conference
Number of pages	7
Publisher	IEEE
Publication date	2021
ISBN (Print)	978-1-6654-0713-7
DOIs	https://doi.org/10.1109/NorCAS53631.2021.9599642
Publication status	Published - 2021
Event	2021 IEEE Nordic Circuits and Systems Conference - Virtuel event, Oslo, Norway Duration: 26 Oct 2021 → 27 Oct 2021 https://events.tuni.fi/norcas2021/ https://ieeexplore.ieee.org/xpl/conhome/9599834/proceeding

Conference

Conference	2021 IEEE Nordic Circuits and Systems Conference
Location	Virtuel event
Country/Territory	Norway
City	Oslo
Period	26/10/2021 → 27/10/2021
Internet address	https://events.tuni.fi/norcas2021/ https://ieeexplore.ieee.org/xpl/conhome/9599834/proceeding

Keywords

DC-DC power converters
CMOS integrated circuits
Switched capacitor circuits
Regulators
Electromagnetic interference
Charge pumps
Switching converters

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10.1109/NorCAS53631.2021.9599642

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@inproceedings{367fdb10a2ae49e594489548078e91c9,

title = "A Gate Voltage Sensing Ripple Reduction Control Technique for Switched-Capacitor DC-DC Converters",

abstract = "A gate voltage sensing based control technique for switched-capacitor (SC) DC-DC converters with low output voltage ripple and input peak currents is presented. The technique implements two control loops. An inner loop regulates the output voltage to virtually eliminate output voltage ripple and significantly reduce the input peak current. An outer control loop uses a control signal from the inner loop to implement switching frequency modulation to ensure high efficiency across a wide output current range. The proposed technique is implemented in a 28 nm FD-SOI CMOS process as a 2:1 series-parallel SC converter for 1.8 V input voltage, 500 mV to 850 mV output voltage and 40 µA to 6 µA output current. Across this range, the proposed technique shows an output voltage ripple reduction from 49.7mV to 3.0mV at 40µA and from 23 mV to 2.5 mV at 6 mA with no discernible effect on the power-stage efficiency.",

keywords = "DC-DC power converters, CMOS integrated circuits, Switched capacitor circuits, Regulators, Electromagnetic interference, Charge pumps, Switching converters",

author = "Sonnichsen, \{Christian Westmark\} and Paul Stephansson",

year = "2021",

doi = "10.1109/NorCAS53631.2021.9599642",

language = "English",

isbn = "978-1-6654-0713-7",

booktitle = "Proceedings of 2021 IEEE Nordic Circuits and Systems Conference",

publisher = "IEEE",

address = "United States",

note = "2021 IEEE Nordic Circuits and Systems Conference , NorCAS 2021 ; Conference date: 26-10-2021 Through 27-10-2021",

url = "https://events.tuni.fi/norcas2021/, https://ieeexplore.ieee.org/xpl/conhome/9599834/proceeding",

}

TY - GEN

T1 - A Gate Voltage Sensing Ripple Reduction Control Technique for Switched-Capacitor DC-DC Converters

AU - Sonnichsen, Christian Westmark

AU - Stephansson, Paul

PY - 2021

Y1 - 2021

N2 - A gate voltage sensing based control technique for switched-capacitor (SC) DC-DC converters with low output voltage ripple and input peak currents is presented. The technique implements two control loops. An inner loop regulates the output voltage to virtually eliminate output voltage ripple and significantly reduce the input peak current. An outer control loop uses a control signal from the inner loop to implement switching frequency modulation to ensure high efficiency across a wide output current range. The proposed technique is implemented in a 28 nm FD-SOI CMOS process as a 2:1 series-parallel SC converter for 1.8 V input voltage, 500 mV to 850 mV output voltage and 40 µA to 6 µA output current. Across this range, the proposed technique shows an output voltage ripple reduction from 49.7mV to 3.0mV at 40µA and from 23 mV to 2.5 mV at 6 mA with no discernible effect on the power-stage efficiency.

AB - A gate voltage sensing based control technique for switched-capacitor (SC) DC-DC converters with low output voltage ripple and input peak currents is presented. The technique implements two control loops. An inner loop regulates the output voltage to virtually eliminate output voltage ripple and significantly reduce the input peak current. An outer control loop uses a control signal from the inner loop to implement switching frequency modulation to ensure high efficiency across a wide output current range. The proposed technique is implemented in a 28 nm FD-SOI CMOS process as a 2:1 series-parallel SC converter for 1.8 V input voltage, 500 mV to 850 mV output voltage and 40 µA to 6 µA output current. Across this range, the proposed technique shows an output voltage ripple reduction from 49.7mV to 3.0mV at 40µA and from 23 mV to 2.5 mV at 6 mA with no discernible effect on the power-stage efficiency.

KW - DC-DC power converters

KW - CMOS integrated circuits

KW - Switched capacitor circuits

KW - Regulators

KW - Electromagnetic interference

KW - Charge pumps

KW - Switching converters

U2 - 10.1109/NorCAS53631.2021.9599642

DO - 10.1109/NorCAS53631.2021.9599642

M3 - Article in proceedings

SN - 978-1-6654-0713-7

BT - Proceedings of 2021 IEEE Nordic Circuits and Systems Conference

PB - IEEE

T2 - 2021 IEEE Nordic Circuits and Systems Conference

Y2 - 26 October 2021 through 27 October 2021

ER -

A Gate Voltage Sensing Ripple Reduction Control Technique for Switched-Capacitor DC-DC Converters

Abstract

Conference

Keywords

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