An integrated dual-side series/parallel piezoelectric resonator-based 20-to-2.2v DC-DC converter achieving a 310% loss reduction - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2024

An integrated dual-side series/parallel piezoelectric resonator-based 20-to-2.2v DC-DC converter achieving a 310% loss reduction

Résumé

Piezoelectric resonators (PRs) have recently emerged as an attractive substitute for inductors to process energy in DC-DC converters, due to their low-volume planar formfactors, superior volume/frequency scaling capabilities, very high Q, ability to be batch fabricated at low cost, and integration potential directly into Si (Fig. 8.6.1 top left) [1–3]. The baseline PR converter described in the literature [1] (Fig. 8.6.1, top right), achieves high efficiency by operating the PR in the inductive region and enabling zero-voltage switching (ZVS) and soft-charging of the PR’s junction capacitor, $C_p$. However, as shown in Fig. 8.6.1 (bottom left), the PR’s utilization factor, K, is maximal at a voltage conversion ratio (VCR) of 0.5, and falls off rapidly at lower VCRs [1]. At the lower VCRs demanded by many modern DC-DC applications (e.g., VCR<0.1), the PR mostly circulates current within itself, leading to a high peak resonant current, $I_{L,PR(pk)}$, high PR vibration losses, and poor efficiency. Recent art has suggested adopting a hybrid switched-capacitor (SC) / PR-based structure, where the SC network provides part of the voltage conversion to allow for the PR to operate with a higher K and to distribute the voltage drop across low-voltage transistors [4, 5]. However, such prior art only includes a single flying capacitor, which limits the optimal conversion ratio to only 0.25 to 0.33. Importantly, no IC-based PR converter has been demonstrated in the literature to date, and no work has reported operation at low voltage outputs with a high step-down ratio (e.g., V$_{ip}$>10V, V0<2V).
Fichier principal
Vignette du fichier
ilovepdf_merged.pdf (10.89 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04522793 , version 1 (27-03-2024)

Identifiants

Citer

Wen-Chin Brian Liu, Gaël Pillonnet, Patrick Mercier. An integrated dual-side series/parallel piezoelectric resonator-based 20-to-2.2v DC-DC converter achieving a 310% loss reduction. ISSCC 2024 - IEEE International Solid-State Circuits Conference, Feb 2024, San Francisco, France. pp.364-366, ⟨10.1109/ISSCC49657.2024.10454471⟩. ⟨hal-04522793⟩
8 Consultations
1 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More