In automotive industry, every electronic device is driven by power switches. Indeed, the energy source is the car battery and it cannot, for instance, limit the output maximum voltage level. Consequently it could be higher than that supported by the load. The DC/DC Buck converter acts by limiting the output variables, according with the load specifications thereby ensuring its correct operation. The overall circuit will be composed of a power stage, the basic DC/DC converter, and a control loop, to provide a target output current value. This paper presents a control algorithm derived from an improved Peak Current Mode Control. The proposed algorithm defined Variable off-Time Peak Current Mode Control (VoT-PCMC) allows to contemporarily control in a DCDC converter the ripple and the average current values, leading to a reliable load driver. The algorithm operation is simulated and then tested on hardware using dSpace, a Rapid Control Prototyping set-up.
Gasparri, O., Di Lorenzo, R., Del Croce, P., Pidutti, A., Baschirotto, A. (2019). Variable off-Time Peak Current Mode Control (VoT-PCMC) as method for average current regulation in Buck Converter Drivers. In 2019 26th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2019 (pp.258-261). IEEE [10.1109/ICECS46596.2019.8964979].
Variable off-Time Peak Current Mode Control (VoT-PCMC) as method for average current regulation in Buck Converter Drivers
Gasparri, O
Primo
;Di Lorenzo, R
Secondo
;Pidutti, A;Baschirotto, A
2019
Abstract
In automotive industry, every electronic device is driven by power switches. Indeed, the energy source is the car battery and it cannot, for instance, limit the output maximum voltage level. Consequently it could be higher than that supported by the load. The DC/DC Buck converter acts by limiting the output variables, according with the load specifications thereby ensuring its correct operation. The overall circuit will be composed of a power stage, the basic DC/DC converter, and a control loop, to provide a target output current value. This paper presents a control algorithm derived from an improved Peak Current Mode Control. The proposed algorithm defined Variable off-Time Peak Current Mode Control (VoT-PCMC) allows to contemporarily control in a DCDC converter the ripple and the average current values, leading to a reliable load driver. The algorithm operation is simulated and then tested on hardware using dSpace, a Rapid Control Prototyping set-up.
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