A VCO-Based Modulation Low Ripple PFM-PWM Buck Converter With Seamless Mode Transition
A voltage-controlled-oscillator(VCO)-based modulation PFM-PWM Buck converter is proposed to effectively reduce the output voltage ripple in PFM mode. The converter employs a VCO circuit instead of a hysteresis comparator to achieve PFM operation, ensuring a single inductor current pulse per cycle re...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2024-09, p.1-11 |
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| container_title | IEEE transactions on circuits and systems. I, Regular papers |
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| creator | Zhao, Zhong Luo, Ping Zhang, Zhiyuan Fan, Jiahang Zhen, Shaowei Zhang, Bo |
| description | A voltage-controlled-oscillator(VCO)-based modulation PFM-PWM Buck converter is proposed to effectively reduce the output voltage ripple in PFM mode. The converter employs a VCO circuit instead of a hysteresis comparator to achieve PFM operation, ensuring a single inductor current pulse per cycle regardless of load current. A loop model for PFM mode is established for design of stability. Additionally, a hysteresis-based seamless mode transition method is incorporated to ensure converter consistent operating during full load range. Implemented using 0.18 \mu m BCD technology, experimental results demonstrate minimal output voltage ripple of 2.5mV in PWM mode and of 8mV in PFM mode with empty load at output voltage of 5V. Moreover, the converter achieves optimal efficiency of up to 92%. |
| doi_str_mv | 10.1109/TCSI.2024.3462473 |
| format | Article |
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The converter employs a VCO circuit instead of a hysteresis comparator to achieve PFM operation, ensuring a single inductor current pulse per cycle regardless of load current. A loop model for PFM mode is established for design of stability. Additionally, a hysteresis-based seamless mode transition method is incorporated to ensure converter consistent operating during full load range. Implemented using 0.18<inline-formula> <tex-math notation="LaTeX">\mu</tex-math> </inline-formula>m BCD technology, experimental results demonstrate minimal output voltage ripple of 2.5mV in PWM mode and of 8mV in PFM mode with empty load at output voltage of 5V. 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I, Regular papers</title><addtitle>TCSI</addtitle><description>A voltage-controlled-oscillator(VCO)-based modulation PFM-PWM Buck converter is proposed to effectively reduce the output voltage ripple in PFM mode. The converter employs a VCO circuit instead of a hysteresis comparator to achieve PFM operation, ensuring a single inductor current pulse per cycle regardless of load current. A loop model for PFM mode is established for design of stability. Additionally, a hysteresis-based seamless mode transition method is incorporated to ensure converter consistent operating during full load range. Implemented using 0.18<inline-formula> <tex-math notation="LaTeX">\mu</tex-math> </inline-formula>m BCD technology, experimental results demonstrate minimal output voltage ripple of 2.5mV in PWM mode and of 8mV in PFM mode with empty load at output voltage of 5V. Moreover, the converter achieves optimal efficiency of up to 92%.</description><subject>Buck converters</subject><subject>Capacitors</subject><subject>Circuit stability</subject><subject>Circuits</subject><subject>Clocks</subject><subject>Hysteresis</subject><subject>hysteresis-based seamless mode transition</subject><subject>Inductors</subject><subject>Low output voltage ripple</subject><subject>PFM loop model</subject><subject>PFM-PWM buck converter</subject><subject>Pulse width modulation</subject><subject>Voltage control</subject><subject>Voltage-controlled oscillators</subject><subject>voltage-controlled-oscillator-based modulation</subject><issn>1549-8328</issn><issn>1558-0806</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpNkM1OwkAUhSdGExF9ABMX8wJT7_x0OrOERpSEBiIIy2Zob2O1UDJTNL69NrBwdc7ifGfxEXLPIeIc7OMqXU4jAUJFUmmhEnlBBjyODQMD-rLvyjIjhbkmNyF8AAgLkg_IekTX6ZyNXcCSZm15bFxXt3s6a7_pa304NEgXk4wtNhkdH4tPmrb7L_Qderqpu3e6RLdrMIQeRbrybh_qnr8lV5VrAt6dc0jeJk-r9IXN5s_TdDRjBVemY6gUVLxMCifc1gmQympV6UKbuEyUKbSrFFfgYoNbCSgUap5IaU3FnZDA5ZDw02_h2xA8VvnB1zvnf3IOeS8m78XkvZj8LOaPeTgxNSL-22ubCGvlLwDOXZ4</recordid><startdate>20240927</startdate><enddate>20240927</enddate><creator>Zhao, Zhong</creator><creator>Luo, Ping</creator><creator>Zhang, Zhiyuan</creator><creator>Fan, Jiahang</creator><creator>Zhen, Shaowei</creator><creator>Zhang, Bo</creator><general>IEEE</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/zhangbo@uestc.edu.cn</orcidid><orcidid>https://orcid.org/zhaozhong_a@163.com</orcidid><orcidid>https://orcid.org/792790963@qq.com</orcidid><orcidid>https://orcid.org/pingl@uestc.edu.cn</orcidid></search><sort><creationdate>20240927</creationdate><title>A VCO-Based Modulation Low Ripple PFM-PWM Buck Converter With Seamless Mode Transition</title><author>Zhao, Zhong ; Luo, Ping ; Zhang, Zhiyuan ; Fan, Jiahang ; Zhen, Shaowei ; Zhang, Bo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c148t-e440f1d7ca2aba2034964f6c685d748c6af4140a58eb30e24e6173398f1a23013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Buck converters</topic><topic>Capacitors</topic><topic>Circuit stability</topic><topic>Circuits</topic><topic>Clocks</topic><topic>Hysteresis</topic><topic>hysteresis-based seamless mode transition</topic><topic>Inductors</topic><topic>Low output voltage ripple</topic><topic>PFM loop model</topic><topic>PFM-PWM buck converter</topic><topic>Pulse width modulation</topic><topic>Voltage control</topic><topic>Voltage-controlled oscillators</topic><topic>voltage-controlled-oscillator-based modulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhao, Zhong</creatorcontrib><creatorcontrib>Luo, Ping</creatorcontrib><creatorcontrib>Zhang, Zhiyuan</creatorcontrib><creatorcontrib>Fan, Jiahang</creatorcontrib><creatorcontrib>Zhen, Shaowei</creatorcontrib><creatorcontrib>Zhang, Bo</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><jtitle>IEEE transactions on circuits and systems. I, Regular papers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Zhao, Zhong</au><au>Luo, Ping</au><au>Zhang, Zhiyuan</au><au>Fan, Jiahang</au><au>Zhen, Shaowei</au><au>Zhang, Bo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A VCO-Based Modulation Low Ripple PFM-PWM Buck Converter With Seamless Mode Transition</atitle><jtitle>IEEE transactions on circuits and systems. I, Regular papers</jtitle><stitle>TCSI</stitle><date>2024-09-27</date><risdate>2024</risdate><spage>1</spage><epage>11</epage><pages>1-11</pages><issn>1549-8328</issn><eissn>1558-0806</eissn><coden>ITCSCH</coden><abstract>A voltage-controlled-oscillator(VCO)-based modulation PFM-PWM Buck converter is proposed to effectively reduce the output voltage ripple in PFM mode. The converter employs a VCO circuit instead of a hysteresis comparator to achieve PFM operation, ensuring a single inductor current pulse per cycle regardless of load current. A loop model for PFM mode is established for design of stability. Additionally, a hysteresis-based seamless mode transition method is incorporated to ensure converter consistent operating during full load range. Implemented using 0.18<inline-formula> <tex-math notation="LaTeX">\mu</tex-math> </inline-formula>m BCD technology, experimental results demonstrate minimal output voltage ripple of 2.5mV in PWM mode and of 8mV in PFM mode with empty load at output voltage of 5V. 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| source | IEEE Electronic Library (IEL) |
| subjects | Buck converters Capacitors Circuit stability Circuits Clocks Hysteresis hysteresis-based seamless mode transition Inductors Low output voltage ripple PFM loop model PFM-PWM buck converter Pulse width modulation Voltage control Voltage-controlled oscillators voltage-controlled-oscillator-based modulation |
| title | A VCO-Based Modulation Low Ripple PFM-PWM Buck Converter With Seamless Mode Transition |
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