Pseudo-Ramp Current Balance (PRCB) Technique With Offset Cancellation Control (OCC) in Dual-Phase DC-DC Buck Converter

Su, Yi; Chen, Wei‐Chung; Yu, Han; Lee, Yu Huei; Chen, Ke-Horng; Luo, Hsin Yu

doi:10.1109/tvlsi.2013.2283606

Cited by 13 publications

(3 citation statements)

References 22 publications

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“…where g m (MOD) represents the transconductance of the modulator, (6) g m (MOD) × V COMP is the output current of the DC-DC converter, and R LOAD represents the load resistance.…”

Section: Discussionmentioning

confidence: 99%

Frequency Compensation with Capacitor Multiplier in DC–DC Converter

Liu¹,

Chen²,

Wang³

2022

Sensors and Materials

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In this paper, we present on-chip frequency compensation with a capacitor multiplier for a current-mode control DC-DC converter. The capacitor multiplier technique can effectively remove the crossover frequency from the origin. An equivalent capacitance is obtained by amplifying the small current in the capacitor. The value of the equivalent capacitor can be adjusted. The functional block diagram and small-signal transfer function of a buck DC-DC converter are derived for a simplified system loop for on-chip frequency compensation with a capacitor multiplier. In this paper, the derived system transfer function for frequency compensation is verified by simulation and from test results. The proposed circuit is suitable for low-cost and small-size applications. Simulation results and experimental results are presented to demonstrate the theoretical analysis.

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“…where g m (MOD) represents the transconductance of the modulator, (6) g m (MOD) × V COMP is the output current of the DC-DC converter, and R LOAD represents the load resistance.…”

Section: Discussionmentioning

confidence: 99%

Frequency Compensation with Capacitor Multiplier in DC–DC Converter

Liu¹,

Chen²,

Wang³

2022

Sensors and Materials

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“…In [1], a three-phase DC-DC converter is analyzed, but the model is only limited to a specific topology and cannot be used for other DC-DC converters with different phase number. The method proposed in [7]- [9] overcomes the topology limitation, but only if the phases are ideally symmetric. In [10] and [11], stray parameters and asymmetry of NMDC are considered, but only steady-state analysis is performed.…”

Section: Introductionmentioning

confidence: 99%

Robustness Analysis and Controller Design Based on a Generalized Model of Nonisolated Multiphase DC–DC Converter

Yan

Zhan

et al. 2022

IEEE Access

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The nonisolated multiphase dc-dc converter (NMDC) has important research value and broad application prospect in fields such as smart grid and new energy vehicles because of its high power density and low output ripple. However, with the increase of the phase number, the parameter inconsistency among each phase will make the NMDC model quite complex. Moreover, parameter uncertainty and quadratic nonlinearity in the small-signal model can degrade control system performance, leading to a big challenge in controller design. In this paper, the generalized robust control model and the method of robust controller designing of NMDC concerning parameter uncertainty and quadratic nonlinearity is developed. Firstly, parameter uncertainty is described by convex polyhedra model. Secondly, the Lyapunov theorem is applied to solve the linear and quadratic nonliearity of the control model. Finally, with the method of Linear Matrix Inequality (LMI) region pole configuration, the analytical solution of the control model is achieved. Based on the proposed model, the independent control of NMDC with reduced sensors, including current sharing, flexible power distribution and robust control of the NMDC are realized. Both simulation and experimental results verify the effectiveness of the controller. Compared with traditional controller, the controller proposed in this paper can be stable in more complicated working conditions, and has a faster adjustment time, suitable for multiple topologies as well.INDEX TERMS nonisolated multiphase dc-dc converter (NMDC), parameter uncertainty, quadratic nonlinearity, convex polyhedron, robust control

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“…The model proposed in [26]- [28] has overcome the abovementioned limitation, but the duty-cycle of each phase has to be the same. The work in [29], [30] has taken stray and asymmetric parameters of NMDC into consideration, but it only gives a steady-state analysis.…”

Section: Introductionmentioning

confidence: 99%

A Generalized Model of Nonisolated Multiphase DC–DC Converter Based on Novel Switching Period Averaging Method

Zhan

Zhang

et al. 2015

IEEE Trans. Power Electron.

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The continuously innovated topologies of Nonisolated Multi-phase DC-DC Converter (NMDC) demand generalized and flexible models for controller design. However, the increased phase number, coupling of inductors, stray circuit parameters and asymmetric problems make the modeling work difficult. In this paper, a novel switching period averaging method aiming to simplify the modeling process is proposed. The method takes full advantage of the linear characteristic of the circuit differential equations to find out the relationship between averaged state variables and switch duty-cycles. Then, the generalized model applicable to several different topologies of NMDC is derived. The analytical solutions of steady-state model, dynamic model in both time and frequency domain are all approached. In order to verify the results, a Matlab/Simulink model and the corresponding experimental prototype of a fourphase boost converter with two groups of two-phase coupled inductors are built. Both results coincide with the theoretical derivation, which indicates the effectiveness of the proposed method. Finally, a design process of H∞ controller for NMDC is presented to show the application of this model.

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Pseudo-Ramp Current Balance (PRCB) Technique With Offset Cancellation Control (OCC) in Dual-Phase DC-DC Buck Converter

Cited by 13 publications

References 22 publications

Frequency Compensation with Capacitor Multiplier in DC–DC Converter

Frequency Compensation with Capacitor Multiplier in DC–DC Converter

Robustness Analysis and Controller Design Based on a Generalized Model of Nonisolated Multiphase DC–DC Converter

A Generalized Model of Nonisolated Multiphase DC–DC Converter Based on Novel Switching Period Averaging Method

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