An Efficiency-Enhanced Auto-Reconfigurable 2formula formulatype='inline' img src='/images/tex/326.gif' alt='times' /formula/3formula formulatype='inline' img src='/images/tex/326.gif' alt='times' /formula SC Charge Pump for Transcutaneous Power Transmission

摘要

An auto-reconfigurable 2$times$ /3$times$ switched-capacitor charge pump (SC-CP) for transcutaneous power transmission is presented in this paper. The proposed SC-CP can automatically configure its own voltage conversion ratio according to different input voltages by using the adaptive control circuitry such that the DC/DC regulator can maintain high power efficiencies under coupling variations. In addition, a dynamic dead-time control scheme and a minimum capacitance selection strategy are developed to improve the power efficiency of the proposed SC-CP through minimizing the shoot-through current and maximizing its average output voltage, respectively.