DocumentCode :
3546860
Title :
Digital assistant current sensor for PWM DC-DC converter with segmented output stage
Author :
Ping Luo ; Jianluo Chen ; Ming Luo ; Yi-Kun Mo
Author_Institution :
State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume :
2
fYear :
2013
fDate :
15-17 Nov. 2013
Firstpage :
358
Lastpage :
361
Abstract :
A digital assistant sensor in PWM converter with segmented output stage is proposed in this paper. The output stage is segmented according to the load current, especially segmented in light loads condition. Conversional current sensor in a power integrated converter is not accurate enough for the light loads. A segmented current sensor (SCS) allying a time digital converter (TDC) is proposed to sensor the load current at light load condition in discontinuous current mode (DCM) in this paper. The SCS detects the load current in continuous current mode (CCM). Hence, refined segmented output stage can be obtained for optimized efficiency. The structure of the proposed digital assistant current sensor is described in this paper. And the PWM converter with the adaptive segmented output stage is designed and simulated in a 0.13μm standard CMOS process. The simulation results show that the maximum efficiency improvement of the proposed converter reaches 8% compared to converter without segment.
Keywords :
CMOS integrated circuits; DC-DC power convertors; PWM power convertors; electric current measurement; electric sensing devices; time-digital conversion; PWM DC-DC converter; digital assistant current sensor; discontinuous current mode; light loads condition; load current; maximum efficiency improvement; power integrated converter; refined segmented output stage; segmented current sensor; size 0.13 mum; standard CMOS process; time digital converter; Delays; Logic gates; MOSFET; Pulse width modulation; Pulse width modulation converters; Simulation; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, Circuits and Systems (ICCCAS), 2013 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-3050-0
Type :
conf
DOI :
10.1109/ICCCAS.2013.6765356
Filename :
6765356
Link To Document :
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