A Current Sensing Method with Enhanced Immunity to Reference Ground Disturbance
Journal
IFEEC 2025 - Proceedings of the 2025 International Future Energy Electronics Conference
Start Page
248
End Page
253
ISBN (of the container)
979-833154947-3
Date Issued
2025-12-24
Author(s)
Kang, En-Chi
Abstract
This paper proposes a current sensing method by using the Enhanced Capture (eCAP) which is a function of the microcontroller. The proposed sensing method detects the rising and falling edges of the pulse signal, computes its duty ratio, and subsequently decodes the signal to reconstruct the actual sensed current. It has a better noise immunity than using the Analog-to-Digital Converter (ADC), which is easily affected by noise. The proposed sensing method can get more precise feedback value when the reference ground of microcontroller is interfered. This paper introduces the operation of the eCAP module and provides a detailed description of the sensing circuit design process. Additionally, the method for reconstructing the actual current from the signals obtained by the eCAP is presented. Simulation results obtained from the PLECS software and experimental results using the Texas Instruments LAUNCHXL-F28379D as the microcontroller are presented for validation. Finally, a histogram is used to compare the accuracy of the proposed sensing method and the ADC sensing method.
Event(s)
2025 International Future Energy Electronics Conference, IFEEC 2025
Subjects
current sensing
digital control
enhanced capture (eCAP)
reference ground disturbance
Publisher
IEEE
Type
conference paper