Energies (Jul 2019)

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

  • Michael Heidinger,
  • Qihao Xia,
  • Christoph Simon,
  • Fabian Denk,
  • Santiago Eizaguirre,
  • Rainer Kling,
  • Wolfgang Heering

DOI
https://doi.org/10.3390/en12142793
Journal volume & issue
Vol. 12, no. 14
p. 2793

Abstract

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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.

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