Title :
Digital controlled dead-time for tri-mode buck-boost DC-DC converters
Author :
Silu Cheng ; Suying Yao ; Ge Jin ; Ng, W.T.
Author_Institution :
Sch. of Electron. & Inf. Eng., Tianjin Univ., Tianjin, China
Abstract :
This paper introduces a unique digital controller for a tri-mode non-inverting buck-boost DC-DC converter that optimizes the switching dead-times to eliminate the cross-conductions and body-diode conductions. A hybrid digital pulse width modulator (DPWM) is developed to implement trailing-edge, leading-edge modulation at high switching frequencies. An improvement in peak power conversion efficiency of 4% in the boost mode is observed, with output current ranging from 0 to 6A.
Keywords :
DC-DC power convertors; PWM power convertors; digital control; body-diode conduction elimination; cross-conduction elimination; digital controlled dead-time; hybrid digital pulse width modulator; peak power conversion efficiency; switching dead-times; tri-mode noninverting buck-boost DC-DC converter; Computer architecture; DC-DC power converters; Delays; Hybrid power systems; Image edge detection; Logic gates;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-3296-2
DOI :
10.1109/ICSICT.2014.7021475
