Analysis of the three-chip switching cells approach for integrated multi-phase power converter combining monolithic and hybrid techniques: Experimental validation on SiC and Si power assembly prototypes

Adem Lale 1 Nicolas Videau 1 Abdelhakim Bourennane 1 Frédéric Richardeau 2 Samuel Charlot 1
1 LAAS-ISGE - Équipe Intégration de Systèmes de Gestion de l'Énergie
LAAS - Laboratoire d'analyse et d'architecture des systèmes
2 CS - Convertisseurs Statiques
LAPLACE - LAboratoire PLasma et Conversion d'Energie
Abstract : In this paper, the authors present a novel integration approach for multi-phase IGBT module, based on both monolithic and hybrid integration methods. In this proposed “3-chip” approach, the discrete switches are integrated into three generic monolithic multi-pole power chips and assembled with a judicious packaging. This reduces significantly the commutation loop area and so the stray inductance responsible of overshoot voltage and common-mode dv/dt effect. The operating modes of the multipole chips were validated in an inverter application by 2D simulations under mixed-mode SentaurusTM. In order to characterize the commutation loop of the 3-chip approach, two prototype power modules with different technologies (Si and SiC dies) have been realized on PCB substrates. The stray inductances were measured using a precision impedance analyzer (frequency analysis). A double-pulse characterization was also performed to illustrate the effect of stray inductance reduction at the turn-off (temporal analysis). For comparison purposes, two “classical” power converters have been also realized and analyzed. According the results, measurements and analytic estimates, the proposed packaging design allows reducing the stray inductance by at least a ratio of two as compared to the classical layout.
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Adem Lale, Nicolas Videau, Abdelhakim Bourennane, Frédéric Richardeau, Samuel Charlot. Analysis of the three-chip switching cells approach for integrated multi-phase power converter combining monolithic and hybrid techniques: Experimental validation on SiC and Si power assembly prototypes. Power Electronics and Applications (EPE'15 ECCE-Europe), 2015 17th European Conference on., Sep 2015, Genève, Switzerland. ⟨10.1109/EPE.2015.7311711⟩. ⟨hal-01230267⟩

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