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Open AccessArticle

Current Mode Control of a Series LC Converter Supporting Constant Current, Constant Voltage (CCCV)

Karlsruhe Institute for Technology (KIT)—Light Technology Institute, Engesser Straße 13, 76131 Karlsruhe, Germany
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Energies 2019, 12(14), 2793; https://doi.org/10.3390/en12142793
Received: 22 May 2019 / Revised: 3 July 2019 / Accepted: 11 July 2019 / Published: 20 July 2019
(This article belongs to the Special Issue Advances in High-Efficiency LLC Resonant Converters)
This paper introduces a control algorithm for soft-switching series LC converters. The conventional voltage-to-voltage controller is split into a master and a slave controller. The master controller implements constant current, constant voltage (CCCV) control, required for demanding applications, for example, lithium battery charging or laboratory power supplies. It defines the set-current for the open-loop current slave controller, which generates the pulse width modulation (PWM) parameters. The power supply achieves fast large-signal responses, e.g., from 5 V to 24 V , where 95% of the target value is reached in less than 400 s . The design is evaluated extensively in simulation and on a prototype. A match between simulation and measurement is achieved. View Full-Text
Keywords: control; current mode control; voltage control; transfer function; power converter; soft-switching converter; battery charging control; current mode control; voltage control; transfer function; power converter; soft-switching converter; battery charging
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Heidinger, M.; Xia, Q.; Simon, C.; Denk, F.; Eizaguirre, S.; Kling, R.; Heering, W. Current Mode Control of a Series LC Converter Supporting Constant Current, Constant Voltage (CCCV). Energies 2019, 12, 2793.

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