By Topic

An Efficiency-Enhanced Auto-Reconfigurable 2 \times /3 \times SC Charge Pump for Transcutaneous Power Transmission

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Xiwen Zhang ; Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA ; Hoi Lee

An auto-reconfigurable 2×/3× 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. Implemented in a standard 0.35-μm n-well CMOS process, the proposed SC-CP achieves peak power efficiencies of 95% (2 ×) and 92% (3 ×). The quiescent current consumption of the charge pump has been reduced by 1.6 times (2 ×) and 2.3 times (3 ×) with the dynamic dead-time control. The power efficiency of the DC/DC regulator with the proposed SC-CP is also improved by > 25%, compared to that using the conventional 3×SC-CP, when the input voltage varies from 1.6 V to 2.4 V.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:45 ,  Issue: 9 )