A 10/30 MHz Fast Reference-Tracking Buck Converter With DDA-Based Type-III Compensator

Cheng, Lin; Liu, Yonggen; Ki, Wing-Hung

doi:10.1109/jssc.2014.2346770

Cited by 61 publications

(15 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, then adaptive-sizing logic selects the optimum group of transistors according to the comparison results. Meanwhile, a high accuracy delay-compensated ramp generator similar to the one in [27] is used for high frequency application, and a DCM control block is added to guarantee DCM operation.…”

Section: The Proposed Sensorless Adaptive-sizing Techniquementioning

confidence: 99%

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

Cheng

Shao

Zhang

et al. 2020

IEICE Electron. Express

View full text Add to dashboard Cite

A high frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique is proposed. Instead of conventional adaptive-sizing technique with current sensor, the proposed converter estimates the load current according to the output voltage of error amplifier for switch scaling. The elimination of current sensor reduces power consumption, thus improving efficiency further. This design is validated through simulation in a 0.18 µm CMOS process. At switching frequency of 150 MHz and light-load of 20 mA, the proposed converter achieves a high efficiency of 82.4%, while it is 73.7% with conventional adaptivesizing technique, and 62.4% without adaptive-sizing technique.

show abstract

Section: The Proposed Sensorless Adaptive-sizing Techniquementioning

confidence: 99%

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

Cheng

Shao

Zhang

et al. 2020

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…Table II compares the converging speed of the D-PS-PWM-QPID controlled bidirectional converter with some state-of-the-art converters designed for DVS power supply. In absolute time scale, converters in some works [17], [47] exhibit steadystate operating points faster than this work. However, after normalizing the converging speed in terms of the number of switching cycles required to settle at initial target operating point (N conv ), the proposed SMPS consumes significantly less cycles than others, including a bidirectional converter employed for a PSM stimulator [10].…”

Section: A Numerical Assessmentmentioning

confidence: 76%

Design and analysis of energy recyclable bidirectional converter with digital controller for multichannel microstimulators

Lee

Law

Bermak

2017

Analog Integr Circ Sig Process

View full text Add to dashboard Cite

Abstract-The power supply modulated microstimulator system can drive an expandable electrode array with reduced heat generation across the current drivers and high stimulation efficiency. Although plenty of research efforts have been pour into demonstrating various applications of the power supply modulated microstimulators, a comprehensive analytical modelling of the system to investigate internal and external energy flow during biphasic stimulation pulses spanning over varying loading configurations (e.g. number of electrodes, and stimulation current amplitude) is still lacking. This paper fills the research gap by presenting the systematic tools for attaining insights of a stimulator system featuring a bidirectional DC-DC converter with an algorithmic digital controller. The models employed here are based on traditional analytical methods such as transfer functions and state-space dynamic models incorporating various energy loss circuit elements. With the models, the behaviour and power efficiency under a wide range of parameters associated with stimulator is attained. Numerical assessment reveals that the digital controller can track the output supply voltage at the phase transition boundaries just in tens of switching cycles. The system was also studied on a verification platform, where the internal signals of the digital controller were carefully examined. Measurement results show that the system behavior well matched to the simulation results, demonstrating the effectiveness of the analytical system model for obtaining key insights for generic large-scale micro-stimulator designs.

show abstract

“…Hence, the two ramps are asynchronous and asymmetric. In fact, a circuit has been proposed to solve the issue of peak/valley values, but it generates only one ramp signal, rather than two symmetric ramps [11]. Fig.…”

Section: A Mixed-mode Switching Methods and Proposed Circuitsmentioning

confidence: 99%

Analysis and Design of Mixed-Mode Operation for Noninverting Buck–Boost DC–DC Converters

Wei

2015

IEEE Trans. Circuits Syst. II

View full text Add to dashboard Cite

A non-inverting buck-boost DC-DC converter can work in buck, boost, or buck-boost mode, but it has been analyzed that operating in the buck-boost mode has the lowest efficiency. However, if the buck-boost mode is excluded, the converter may jump between the buck and boost modes when the input voltage approaches the output voltage. This transition region is called the mixed mode, and larger output voltage ripples are expectable. In this work, the conditions for the converter to operate in the mixed mode are analyzed, including the impact of mismatches between ramp signals, and a ramp generator is designed accordingly. Moreover, a full-cycle current sensing circuit is proposed, and it can effectively inhibit the switching noise on the sensed current signal. The proposed chip was fabricated by a 0.35 μm 2P4M 3.3V/5V mixed-signal polycide process. The maximal measured efficiency is 93.5%.

show abstract

A 10/30 MHz Fast Reference-Tracking Buck Converter With DDA-Based Type-III Compensator

Cited by 61 publications

References 29 publications

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

Design and analysis of energy recyclable bidirectional converter with digital controller for multichannel microstimulators

Analysis and Design of Mixed-Mode Operation for Noninverting Buck–Boost DC–DC Converters

Contact Info

Product

Resources

About