학술논문
A 1.5A 88.6% Li-ion Battery Charger Design using Pulse Swallow Technique in Light Load
Document Type
Conference
Author
Source
2019 IEEE International Symposium on Circuits and Systems (ISCAS) Circuits and Systems (ISCAS), 2019 IEEE International Symposium on. :1-4 May, 2019
Subject
Language
ISSN
2158-1525
Abstract
Traditional Li-ion battery chargers face a dilemma, which is the poor efficiency at a large charging current or vice versa. A pulse swallow technique is proposed in this investigation to resolve the mentioned problem. The proposed design carries out the automatic switching of PWM/PFM when the charging operation enters a light load scenario. When the battery voltage is close to the pre-defined full voltage, PFM strobes mask out the system clock to shut off power transistors to boost the efficiency. Post-layout simulations justify the proposed design generates 1.5 A current with 87.4%–88.6% efficiency.