Paper Info
Title
12.3 PWM buck converter with >80% PCE in 45μA-to-4mA loads using analog-digital hybrid control for impiantale biomedical systems
Abstract
Implantable biomedical systems usually operate in energy-limited environments and exhibit large variation of power consumption ranging from constant low-power (bio-signal sensing) to sporadic high-power (stimulation and/or burst data transmission) [1]. Thus, energy-efficient switching power converters that can support a wide range of load variation are necessary to meet this requirement. Pulse frequency modulation (PFM) power converters can support this large load variation with a high power-conversion efficiency (PCE) [2]. However, their unpredictable switching noise degrades the power supply integrity and hence deteriorates the signal quality in implantable biomédical systems. Pulse-width modulation (PWM) power converters can provide predictable output spectrum, but their PCE in light loads suffers. Although various techniques have been explored over the past years [3-5], the PCE of the PWM converters is still not adequate for low current levels (<;100uA) that most of the implantable biomedicai systems consume.
Year
DOI
Venue
2015
10.1109/ISSCC.2015.7063004
ISSCC
Keywords
Field
DocType
prosthetic power supplies,implantable biomedical systems,pwm buck converter,pfm,pce,pulse frequency modulation,pwm power convertors,power-conversion efficiency,analog-digital hybrid control,steady state,inductors,power transistors,pulse width modulation,radiation detectors
Data transmission,Computer science,Power semiconductor device,Pulse-width modulation,Pulse-frequency modulation,Inductor,Converters,Modulation,Electronic engineering,Electrical engineering,Buck converter
Conference
Citations 
PageRank 
References 
0
0.34
3
Authors
4
Name
Order
Citations
PageRank
Sung-Yun Park122.76
Jihyun Cho2628.67
Kyuseok Lee391.71
Euisik Yoon410916.58