A Low-Noise Current-Squared Delta-Sigma-Modulation Boost Converter Suitable for Low-Voltage Wireless Sensor Networks With Transient-Accelerated Techniques

This paper presents a low-noise current-squared delta-sigma-modulation boost converter suitable for low-voltage wireless sensor networks with transient-accelerated techniques. There are two current-controlled loops and two voltage-controlled loops in the proposed converter to achieve low noise, fast...

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Bibliographic Details
Published in:IEEE access 2024, Vol.12, p.182580-182589
Main Authors: Chen, Jiann-Jong, Hwang, Yuh-Shyan, Chiu, Hung-Wei, Gao, Yu-Zhe, Ku, Joshua
Format: Article
Language:English
Subjects:
Buck converter
Circuit stability
dual-current-acceleration technique
Electric potential
Energy conversion efficiency
Fast-transient
Frequency control
Frequency modulation
Low noise
Low voltage
Modulation
Noise control
pseudo-DCR current-sensor
Pulse width modulation
Recovery time
second-order delta-sigma modulation
Switches
Switching frequency
Transient response
Voltage
Voltage control
Wireless sensor networks
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Summary:This paper presents a low-noise current-squared delta-sigma-modulation boost converter suitable for low-voltage wireless sensor networks with transient-accelerated techniques. There are two current-controlled loops and two voltage-controlled loops in the proposed converter to achieve low noise, fast-transient-response times, and low-transient voltages. The converter's transient-accelerated circuit consists of a current sensing circuit and a dynamic slope compensation circuit, which significantly improves the transient response. Additionally, the converter has low output noise and a fast-transient recovery time, and exhibits good undershoot and overshoot voltage control ability when the load current changes. Experimental results indicate that the boost converter is fabricated using the TSMC T18HVG2 1P6M CMOS process with a chip area of 1.26 mm \times 1.18 mm. The sampling frequency of 10 MHz, and the output-to-noise ratio (ONR) is 70.4dB. Furthermore, the converter achieves a peak power efficiency of 88 %, with optimal performance achieved at a load current of 70 mA and an output voltage of 1.8 V.
ISSN:2169-3536
DOI:10.1109/ACCESS.2024.3511496