A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter

This article proposes a high-frequency, area-efficient high-side bootstrap circuit with threshold-based digital control (TBDC) that is directly charged by BUS voltage (DCBV). In the circuit, the voltage of the bootstrap is directly obtained from the BUS voltage instead of the on-chip low dropout reg...

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Autores principales:	Yujie Guo, Fang Yuan, Yukuan Chang, Yuxia Kou, Xu Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bootstrap circuit high voltage buck converter high frequency area-efficient Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/e8c5374e64e24d1f8f4c200c7aa835db
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spelling	oai:doaj.org-article:e8c5374e64e24d1f8f4c200c7aa835db2021-11-25T17:25:26ZA Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter10.3390/electronics102228632079-9292https://doaj.org/article/e8c5374e64e24d1f8f4c200c7aa835db2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-9292/10/22/2863https://doaj.org/toc/2079-9292This article proposes a high-frequency, area-efficient high-side bootstrap circuit with threshold-based digital control (TBDC) that is directly charged by BUS voltage (DCBV). In the circuit, the voltage of the bootstrap is directly obtained from the BUS voltage instead of the on-chip low dropout regulator (LDO), which is more suitable for a high operating frequency. An area-efficient threshold-based digital control structure is used to detect the bootstrap voltage, thereby effectively preventing bootstrap under-voltage or over-voltage that may result in insufficient driving capability, increased loss, or breakdown of the power device. The design and implementation of the circuit are based on CSMC 0.25 µm 60 V BCD technology, with an overall chip area of 1.4 × 1.3 mm<sup>2</sup>, of which the bootstrap area is 0.149 mm<sup>2</sup> and the figure-of-merit (FOM) is 0.074. The experimental results suggest that the bootstrap circuit can normally operate at 5 MHz with a maximum buck converter efficiency of 83.6%. This work plays a vital role in promoting the development of a wide range of new products and new technologies, such as integrated power supplies, new energy vehicles, and data storage centers.Yujie GuoFang YuanYukuan ChangYuxia KouXu ZhangMDPI AGarticlebootstrap circuithigh voltagebuck converterhigh frequencyarea-efficientElectronicsTK7800-8360ENElectronics, Vol 10, Iss 2863, p 2863 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bootstrap circuit high voltage buck converter high frequency area-efficient Electronics TK7800-8360
spellingShingle	bootstrap circuit high voltage buck converter high frequency area-efficient Electronics TK7800-8360 Yujie Guo Fang Yuan Yukuan Chang Yuxia Kou Xu Zhang A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter
description	This article proposes a high-frequency, area-efficient high-side bootstrap circuit with threshold-based digital control (TBDC) that is directly charged by BUS voltage (DCBV). In the circuit, the voltage of the bootstrap is directly obtained from the BUS voltage instead of the on-chip low dropout regulator (LDO), which is more suitable for a high operating frequency. An area-efficient threshold-based digital control structure is used to detect the bootstrap voltage, thereby effectively preventing bootstrap under-voltage or over-voltage that may result in insufficient driving capability, increased loss, or breakdown of the power device. The design and implementation of the circuit are based on CSMC 0.25 µm 60 V BCD technology, with an overall chip area of 1.4 × 1.3 mm<sup>2</sup>, of which the bootstrap area is 0.149 mm<sup>2</sup> and the figure-of-merit (FOM) is 0.074. The experimental results suggest that the bootstrap circuit can normally operate at 5 MHz with a maximum buck converter efficiency of 83.6%. This work plays a vital role in promoting the development of a wide range of new products and new technologies, such as integrated power supplies, new energy vehicles, and data storage centers.
format	article
author	Yujie Guo Fang Yuan Yukuan Chang Yuxia Kou Xu Zhang
author_facet	Yujie Guo Fang Yuan Yukuan Chang Yuxia Kou Xu Zhang
author_sort	Yujie Guo
title	A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter
title_short	A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter
title_full	A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter
title_fullStr	A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter
title_full_unstemmed	A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter
title_sort	bootstrap structure directly charged by bus voltage with threshold-based digital control for high-speed buck converter
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e8c5374e64e24d1f8f4c200c7aa835db
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A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter

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