A Digital Multiphase Converter with Sensor-less Current and Thermal Balance Mechanism

Kai Yu Hu, Yu Sin Chen, Chien Hung Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper presents a sensor-less approach to achieve current balance and thermal balance in a digital voltage mode controlled four-phase buck converter. Rather than utilize current and temperature sensors to gather the current and thermal information as most of previous researches, the sensor-less equivalent resistance (R eq ) ratio estimation is used in this work to obtain the current and thermal information implicitly. Based on the estimative results, the duty offset is further calculated and compensated for each phase to carry out either equal current sharing or uniform thermal distribution. The digital controller was manufactured by TSMC 0.18-μm 1P6M standard CMOS process. The experimental results are proved the practicability of the proposed balancing mechanism. The current balance scheme improves the current sharing error from 35% to 6.3%, while the thermal balance technique narrows down the peak temperature difference from 6.6°C to 1.8°C.

Original languageEnglish
Title of host publication2018 IEEE Asian Solid-State Circuits Conference, A-SSCC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages175-178
Number of pages4
ISBN (Electronic)9781538664124
DOIs
Publication statusPublished - 2018 Dec 14
Event2018 IEEE Asian Solid-State Circuits Conference, A-SSCC 2018 - Tainan, Taiwan
Duration: 2018 Nov 52018 Nov 7

Publication series

Name2018 IEEE Asian Solid-State Circuits Conference, A-SSCC 2018 - Proceedings

Other

Other2018 IEEE Asian Solid-State Circuits Conference, A-SSCC 2018
CountryTaiwan
CityTainan
Period18-11-0518-11-07

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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    Hu, K. Y., Chen, Y. S., & Tsai, C. H. (2018). A Digital Multiphase Converter with Sensor-less Current and Thermal Balance Mechanism. In 2018 IEEE Asian Solid-State Circuits Conference, A-SSCC 2018 - Proceedings (pp. 175-178). [8579301] (2018 IEEE Asian Solid-State Circuits Conference, A-SSCC 2018 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ASSCC.2018.8579301