Design of the Controlled Buck Converter for Wearable Electronic Devices
Tihomir Brusev, Georgi Kunov, Elissaveta Gadjeva
Journal of Electronic Systems, Vol. 10, No. 4, 2020.
DOI: https://doi.org/10.6025/jes/2020/10/4/138-146
Link: https://www.dline.info/jes/fulltext/v10n4/jesv10n4_3.pdf
Abstract:
In the current work, we have formulated a controlled buck convertor based on integrated Pulse-Width Modulation (PWM) and Pulse-Frequency Modulation (PFM). This is developed for wearable electronic devices. The input voltage is equal to 3.6V and the average value of the output voltage is regulated to be 1.7V. The maximum efficiency h of the buck converter is 81.43%, when the load current ILoad is equal to 68mA. When ILoad is smaller than 8mA the efficiency of the PFM controlled buck converter is around 7% higher compared to the efficiency of the PWM controlled buck converter.