A High Efficiency Current Mode Buck Converter with a Power-Loss-Aware Switch-On-Demand Modulation Technique for Multifunction SoCs

2016 ◽  
pp. 1-1
Author(s):  
Chung-Hsun Huang ◽  
Chao-Chun Chen
Keyword(s):  
Power Loss ◽  
High Efficiency ◽  
Current Mode ◽  
Buck Converter ◽  
On Demand ◽  
Modulation Technique

A Dual-Mode High-Voltage High-Efficiency Peak-Current-Mode Asynchronous Buck Converter

2016 ◽  
Vol 25 (11) ◽  
pp. 1650136 ◽  
Author(s):  
Zhaohan Li ◽  
Yongcheng Ji ◽  
Shu Yang ◽  
Yuchun Chang
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Load Condition ◽  
Reducing Power ◽  
Current Mode ◽  
Buck Converter ◽  
Maximum Efficiency ◽  
Maximum Output ◽  
Peak Current ◽  
Light Load

This paper proposes a high-voltage high-efficiency peak-current-mode asynchronous DC–DC step-down converter operating with dual operation modes. The asynchronous buck converter achieves higher efficiency in light load condition compared to synchronous buck converters. Furthermore, the proposed buck converter switches operation mode automatically from pulse-width modulation (PWM) mode to pulse-skipping mode (PSM). By reducing power MOS on-state resistance and optimizing rise/fall time of switches, the proposed buck converter also obtains high efficiency under heavy load condition. The maximum efficiency of the proposed buck converter is 92.9%, implemented with 0.35[Formula: see text][Formula: see text]m BCDMOS 2P3M process, and the total size is 1.1[Formula: see text] 1.2[Formula: see text]mm2. The input range and output range of the converter are 6–30 V, and ([Formula: see text]–3) V, respectively, with the maximum output current of 3 A. Moreover, its built-in current loop leads to good transient response characteristics. Therefore, it can be used widely in communication system and 12 V/24 V distributed power system.

scholarly journals A Current-Mode Four-Phase Synchronous Buck Converter with Dynamic Dead-Time Control

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Jun Tang ◽  
Tian Guo ◽  
Jung Sik Kim ◽  
Jeongjin Roh
Keyword(s):  
Dead Time ◽  
Current Mode ◽  
Buck Converter ◽  
Time Control ◽  
A Current

scholarly journals Compensated Single Input Multiple Output Flyback Converter

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3009
Author(s):  
Mohammad Tahan ◽  
David O. Bamgboje ◽  
Tingshu Hu
Keyword(s):  
Transient Response ◽  
Current Mode ◽  
Voltage Regulation ◽  
Buck Converter ◽  
Output Channel ◽  
Flyback Converter ◽  
Input Multiple Output ◽  
Voltage Deviation ◽  
Single Input ◽  
The Cross

A new single-input multiple-output (SIMO) converter is proposed in this work by incorporating flyback and buck converters in a master–slave configuration. The objective of this work is to address the cross regulation problem, achieve tight voltage regulation, improve the circuit form factor and attain a fast transient response for a SIMO flyback converter. The flyback converter maintains the output channels within 10% of their rated voltages and the SIMO buck converter is placed in series with the flyback converter such that it compensates for the output voltage deviation. Moreover, a time multiplexing switching scheme decouples output channel to eliminate the cross-regulation problem and remove the need for an additional winding transformer per each output channel. A type II compensator with a peak current mode controller was designed to achieve faster transient response which is critical for the proposed configuration. A thorough steady-state analysis was carried out on a triple output channel topology to obtain the design criteria and component values. MATLAB/Simscape modelling and simulation was used to validate the effectiveness of the proposed converter with the result yielding satisfactory transience even with load disturbance. Additionally, the result of the proposed converter is compared with previously published works.

COMPLEX DYNAMICS AND FAST-SLOW SCALE INSTABILITY IN CURRENT-MODE CONTROLLED BUCK CONVERTER WITH CONSTANT CURRENT LOAD

2013 ◽  
Vol 23 (04) ◽  
pp. 1350062 ◽  
Author(s):  
GUOHUA ZHOU ◽  
BOCHENG BAO ◽  
JIANPING XU
Keyword(s):  
Complex Dynamics ◽  
Period Doubling ◽  
Current Mode ◽  
Input Voltage ◽  
Second Order ◽  
Buck Converter ◽  
Constant Current ◽  
Current Load ◽  
Time Model ◽  
Conduction Mode

The complex dynamics and coexisting fast-slow scale instability in current-mode controlled buck converter with constant current load (CCL), operating in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), are investigated in this paper. Via cycle-by-cycle computer simulation and experimental measurement of current-mode controlled buck converter with CCL, it is found that a unique fast-slow scale instability exists in the second-order switching converter. It is also found that a unique period-doubling accompanied by Neimark–Sacker bifurcation exists in this simple second-order converter, which is different from period-doubling or Neimark–Sacker bifurcations reported previously. Based on a nonlinear discrete-time model and the corresponding Jacobian, the effects of CCL and input voltage on the dynamics of current-mode controlled buck converter are investigated and verified theoretically. Fixed point analysis for slow-scale low-frequency oscillation is also given to verify the dynamics and the coexisting fast-slow scale instability.

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