Commented ppt slides of presentation which should be originally shown at the CIPS 2020 - 11th International Conference on Integrated Power Electronics Systems in Berlin in march 2020. Slides available at:
Article in IEEEXPLORE:
Abstract:
A mixed signal control scheme for DC/DC converters operating with triangular current mode (TCM) is proposed, which leads to a reduction in EMI by simultaneously employing a spread spectrum modulation of the converter switching frequency and maintaining zero voltage switching (ZVS). This is achieved by combining an analog hysteretic current controller with random modulated thresholds generated by a digital voltage controller. By simultaneously changing two switching thresholds, the control scheme also mitigates low frequency oscillations of the output voltage which would be otherwise present. The operation mode is described in detail and validated by measurements on a prototype converter.
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